That is why in Vrndavana there are so many hogs and monkeys and dogs

SB Canto 4

SB 4.29.14, Purport:

The word durmada means "wrongly directed," and nirṛti means "sinful activity." Although this clearly indicates that sex indulgence is abominable and misdirected even from the ordinary point of view, the sahajiyās nonetheless pass themselves off as devotees conducting spiritual activities. For this reason, Vṛndāvana is no longer visited by intelligent men. Sometimes we are often asked why we have made our center in Vṛndāvana. From the external point of view, it can be concluded that Vṛndāvana has become degenerate due to these sahajiyā activities, yet from the spiritual point of view, Vṛndāvana is the only place where all these sinful persons can be rectified by means of taking birth in the forms of dogs, hogs and monkeys. By living in Vṛndāvana as a dog, hog or monkey, the living entity can be elevated to the spiritual platform in the next life.

SB Canto 5

SB 5.8.26, Purport:

In Brahma-saṁhitā (5.54) it is said, karmāṇi nirdahati kintu ca bhakti-bhājām: "For those engaged in devotional service, bhakti-bhajana, the results of past deeds are indemnified." According to this, Bharata Mahārāja could not be punished for his past misdeeds. The conclusion must be that Mahārāja Bharata purposefully became over-addicted to the deer and neglected his spiritual advancement. To immediately rectify his mistake, for a short time he was awarded the body of a deer. This was just to increase his desire for mature devotional service. Although Bharata Mahārāja was awarded the body of an animal, he did not forget what had previously happened due to his purposeful mistake. He was very anxious to get out of his deer body, and this indicates that his affection for devotional service was intensified, so much so that he was quickly to attain perfection in a brāhmaṇa body in the next life. It is with this conviction that we declare in our Back to Godhead magazine that devotees like the gosvāmīs living in Vṛndāvana who purposely commit some sinful activity are born in the bodies of dogs, monkeys and tortoises in that holy land. Thus they take on these lower life forms for a short while, and after they give up those animal bodies, they are again promoted to the spiritual world. Such punishment is only for a short period, and it is not due to past karma. It may appear to be due to past karma, but it is offered to rectify the devotee and bring him to pure devotional service.

SB Canto 9

SB 9.19.19, Purport:

Kṛṣṇa and His abode, Vṛndāvana, are not different. Śrī Caitanya Mahāprabhu said, ārādhyo bhagavān vrajeśa-tanayas tad-dhāma vṛndāvanam. Vṛndāvana is as good as Kṛṣṇa. Therefore, if one somehow or other gets the opportunity to live in Vṛndāvana, and if one is not a pretender but simply lives in Vṛndāvana and concentrates his mind upon Kṛṣṇa, one is liberated from material bondage. One's mind is not purified, however, even in Vṛndāvana, if one is agitated by lusty desires. One should not live in Vṛndāvana and commit offenses, for a life of offenses in Vṛndāvana is no better than the lives of the monkeys and hogs there. Many monkeys and hogs live in Vṛndāvana, and they are concerned with their sexual desires. Men who have gone to Vṛndāvana but who still hanker for sex should immediately leave Vṛndāvana and stop their grievous offenses at the lotus feet of the Lord. There are many misguided men who live in Vṛndāvana to satisfy their sexual desires, but they are certainly no better than the monkeys and hogs.

CC Madhya-lila

CC Madhya 22.132, Purport:

Śrīla Narottama dāsa Ṭhākura has sung:

śrī gauḍa-maṇḍala-bhūmi, yeba jāne cintāmaṇi,

tāra haya vrajabhūmi vāsa

"One who understands the transcendental nature of Navadvīpa and its surrounding area, where Śrī Caitanya Mahāprabhu enacted His pastimes, resides always in Vṛndāvana." Similarly, living in Jagannātha Purī is as good as living in Vṛndāvana. The conclusion is that Navadvīpa-dhāma, Jagannātha Purī-dhāma and Vṛndāvana-dhāma are identical.

However, if one goes to Mathurā-maṇḍala-bhūmi for sense gratification or to make a livelihood, he commits an offense and is condemned. Whoever does so must be penalized in the next life by becoming a hog or a monkey in Vṛndāvana-dhāma. After taking on such a body, the offender is liberated in the next life. Śrīla Bhaktisiddhānta Sarasvatī Ṭhākura remarks that residing in Vṛndāvana with a view to enjoy sense gratification surely leads a so-called devotee to a lower species.

Srimad-Bhagavatam Lectures

Lecture on SB 1.2.17 -- Vrndavana, October 28, 1972:

Prabhupāda: Just like I have got this body according to my desires in the last life, similarly, whatever we are desiring in this life, that will be fulfilled in the next life. Kṛṣṇa is very kind. As we desire, ye yathā māṁ prapadyante tāṁs tathaiva bhajāmy aham (BG 4.11). Kṛṣṇa is so kind that if you want a tiger's body, Kṛṣṇa will give you. If you want a demigod's body, Kṛṣṇa will give you. If you want a body like Kṛṣṇa, Kṛṣṇa will give you. Mad-yājino 'pi yānti mām. That is stated in the Bhagavad-gītā. Yānti deva-vratā devān pitṟn yānti pitṛ-vratāḥ (BG 9.25). Whatever you want, especially in this human form of life, whatever you desire, Kṛṣṇa will give you chance. It may be very unpalatable, but this is a fact. We have heard from authorities.

That is why in Vṛndāvana there are so many hogs and monkeys and dogs. This is very mysterious thing. The siddhānta, the conclusion is, we get it, information from Bhāgavatam... Just like that, the two sons of Kuvera. What is the? Maṇibandha...?

Devotees: Maṇigrīva.

Prabhupāda: Maṇigrīva...?

Devotees: Nalakūvara.

Prabhupāda: Nalakūvara. They wanted extensively sense enjoyment. They were enjoying. At that time, Nārada was passing. But they were so much intoxicated that they could not cover their body. So Nārada cursed them that "You become a tree." But when they were very much submissive, fell down on the feet of Nārada, "How we shall get...?" he asked them to get the tree life in Vṛndāvana. And because they were put in Vṛndāvana, after some time, they were delivered.

So similarly, those who are executing devotional service, but at the same time cheating... Cheating means outwardly very devotional, inwardly doing all sinful activities. Such living entity is given the chance to become a hog and dog in Vṛndāvana so that the reaction of the sinful activities, they get this body; at the same time, due to their touch with the dust of Vṛndāvana, they become eliminated of all sinful activities and liberated. So these hogs and dogs, they're also very important. They are not ordinary thing. But this is the explanation. The tortoise, the... They have, they have got... Therefore a devotee, when he's punished in that way for the short time, they'll be liberated. Undoubtedly.

Lecture on SB 1.2.18 -- Vrndavana, October 29, 1972:

Because you cannot approach Kṛṣṇa in sinful life. Those who are thinking that "We are living in Vṛndāvana, and I can do all sinful activities because I am living in Vṛndāvana. Vṛndāvana-rāja will cure me, will purify me." That's a fact. Yes. But if you go on indulging in such sinful activities, then you'll have to live in Vṛndāvana in like the hogs and monkeys. At least one life you have to spend like that. Then you'll be purified. So why should you waste you're time in that way? Dhāmāparādha. If one is committing sinful activities in the dhāma, Vṛndāvana-dhāma, that is a great offense. Nāmno balād yasya hi pāpa-buddhiḥ. These are the injunction of the śāstras.

So we should be very careful. We should finish our business very quickly. Tūrṇaṁ yateta. Why should we take another risk of become hog and live in Vṛndāvana? Don't take that risk. Naṣṭa-prāyeṣu abhadreṣu. Finish all contamination, dirty things, and become completely pure.

Lecture on SB 1.2.23 -- Vrndavana, November 3, 1972:

Sometimes we are being too much attached to our present possession. We remain in the possession, but in a different form. In a different form. There are many, I mean, Puranic, Pauranic indences(?). That is long story, that by karma, we take birth in different forms of life, and if we have got too much attachment... Sometimes a person, the proprietor of the house, after death, remains in that house as serpent, sometimes as dog, sometimes as tree. Being too much attached to the possession, they cannot get better life. And sometimes we can get the body of a hog and monkey in Vṛndāvana also.

Lecture on SB 1.7.11 -- Vrndavana, September 10, 1976:

Govinda-viraheṇa me. This madness is wanted. Without Govinda, that madness. So that madness (was) fully exhibited in Vṛndāvana by the gopīs. They were mad after Kṛṣṇa. When Kṛṣṇa left Vṛndāvana, went to Mathurā, they became so mad that they had no other business than cakṣuṣā prāvṛṣāyitam, simply crying torrents of rain. That is wanted. That is Vṛndāvana life. Not that seeking after sex in Vṛndāvana. That is... That means such person will have to take birth as monkey next life. Monkey. Because they have taken shelter of Vṛndāvana, and still they're indulging, monkey's business, so they have to... It is Kṛṣṇa's mercy. Tat te 'nukampāṁ su-samīkṣamāṇaḥ (SB 10.14.8). In Vṛndāvana the land, transcendental land, that will not go in vain. But these persons who are indulging unnecessary sex life in Vṛndāvana, they'll have to take birth as monkeys in Vṛndāvana, and then next life they'll be liberated. So otherwise, why in Vṛndāvana the monkeys? They are also devotees, but they could not proceed nicely. So animal life means stopping sinful activities, and whatever sinful reaction is there in one life finished. We should be very, very careful. Dhāma, dhāma-aparādha. In the dhāma... In other places if you chant Hare Kṛṣṇa, the result of such chanting will be increased thousand times if you chant in Vṛndāvana. Similarly, in other place, the sinful activities, if you commit that sinful activity in Vṛndāvana, then it will be thousand times increased. So we have to be very careful.

Lecture on SB 1.7.24 -- Vrndavana, September 21, 1976:

Why gopīs are exalted? Because their only endeavor was to satisfy Kṛṣṇa's senses. Therefore Caitanya Mahāprabhu recommended, ramyā kācid upāsanā vraja-vadhū-vargeṇa yā kalpitā. They had no other business. Vṛndāvana means, those who are in Vṛndāvana... If they actually want to live in Vṛndāvana, their business should be how to satisfy the senses of Kṛṣṇa. That is Vṛndāvana. Not that "I am living in Vṛndāvana and trying to satisfy my senses." That is not vṛndāvana-vāsī. That kind of living is... There are so many monkeys, dogs and hogs also; they are in Vṛndāvana. Do you mean to say that they are living in Vṛndāvana? No. Anyone who wants to satisfy senses in Vṛndāvana, their next life is dogs, hogs, and monkeys. You must know that. So one should not try to sense gratify in Vṛndāvana. That is a great sin. Simply try to satisfy Kṛṣṇa's senses.

Lecture on SB 5.5.23 -- Vrndavana, November 10, 1976:

Āhāra, nidrā, sleeping, and fearing, and sense enjoyment. These are required, but not for increasing but decreasing. Just like when a person is diseased he should not eat as he likes. Because he is diseased, doctor prescribes that "You take little barley water or glucose, no solid food, if you want to be cured." Similarly, these things are necessity so long this body is there. Āhāra-nidrā-bhaya-maithuna. But this should be decreased, not increased. That is human civilization, not to increase. Just like the Gosvāmīs in Vṛndāvana. They did not come here to increase āhāra-nidrā-bhaya-maithuna. No. They came here to decrease. Nidrāhāra-vihārakādi-vijitau **. That is wanted. This is Vṛndāvana-vasi, not that to live in Vṛndāvana and increase this āhāra-nidrā-bhaya-maithuna. This is not Vṛndāvana-vasa. The monkeys are also living in Vṛndāvana, and the dogs are also and hogs are living in Vṛndāvana. But they do not know how to decrease āhāra-nidrā-bhaya-maithunam. You'll see the monkeys. They are also in Vṛndāvana. But you'll find one male monkey followed by three dozen female monkeys. That is not vṛndāvana-vāsa. Āhāra-nidrā. That means it requires brahminical culture, damo, śamo. That is wanted. That is brahminical culture.

Lecture on SB 7.6.4 -- Vrndavana, December 5, 1975:

One has taken to Kṛṣṇa consciousness, but on account of immature Kṛṣṇa consciousness, if he falls down, falls down like that, then he gets... Yoga-bhraṣṭaḥ sanjāyate śucīnāṁ. But if one purposefully commits mistake and sinful life, "Now I am chanting Hare Kṛṣṇa. I can do all sinful life. It will become counteracted," that rascal will be punished very, very much. Nāmnād balād yasya hi pāpa-buddhiḥ. "I am living in Vṛndāvana. Oh, it is dhāma, so let me do all nonsense. It will be counteracted." They'll be these cats and dogs and monkeys in Vṛndāvana. Dhāmāparādha. Dhāmāparādha. Of course, Vṛndāvana's influence will be there, but at least one life he has to become the hog and dog in Vṛndāvana. Then next life he'll be... Because as soon as he becomes animal, there is no scope of unlimited committing sinful life. Animals are restricted. They can commit one kind of sinful life. That, the human being, because he is very intelligence, he commits unlimited duration of sinful life. That is another danger. So one who commits this sinful life in Vṛndāvana, remember, he has to become next life cats and dogs. There, as you see, there are many dogs, hogs. But still, Vṛndāvana-dhāma is so powerful that next life he will get salvation, even if he has become dogs and hogs. But that is not good. Why should we act in such a way that in Vṛndāvana-dhāma we shall commit sinful life and become a cats and dog? Jaya jaya vṛndāvanavāsī yata jana. We should be careful. We should be careful, especially in dhāma, dhāmāparādha.