A sannyasi is recommended to beg from the house of a brahmana. Caitanya Mahaprabhu used to do that, because a brahmana is always suci; they are not unclean

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"a sannyāsī is recommended to beg from the house of a brāhmaṇa. Caitanya Mahāprabhu used to do that, because a brāhmaṇa is always śuci; they are not unclean"

Lectures

Srimad-Bhagavatam Lectures

A sannyāsī is recommended to beg from the house of a brāhmaṇa. Caitanya Mahāprabhu used to do that, because a brāhmaṇa is always śuci; they are not unclean. But they... Provided... Otherwise it is not that one is born of a brāhmaṇa father but does not follow the rules and regulations—he is not a brāhmaṇa. He is called brahma-bandhu.

710130 - Lecture SB 06.02.46 - Allahabad

Kṛṣṇa also says that even if you have fallen down, you will be given chance to take birth in a good family of a brāhmaṇa or in a rich family of vaiśyas. Śrīla Bhaktivinode Ṭhākura has explained these two words . . . what is that? That a person, yoga-bhraṣṭaḥ. Śucīnāṁśrīmatāṁ gehe yoga-bhraṣṭaḥ sañjāyate (BG 6.41).

Śucīnām. Śuci means brāhmaṇa. Brāhmaṇa means he is always clean, internally and externally. Bahyābhyantaraṁśuciḥ. You know this mantra—it is enunciated during initiation—bahyābhyantaraḥśuciḥśrī viṣṇu śrī viṣṇu śrī viṣṇu (Garuḍa Purāṇa). Anyone who is always thinking of Kṛṣṇa, chanting of Viṣṇu's name, Hari's name, or anyone who is particularly Vaiṣṇava, he is śuciḥ.

Brāhmaṇa is supposed to be engaged always in the service of Viṣṇu. Still in old families a brāhmaṇa, there is śālagrāma-śilā; the whole family is engaged. Those who have continued that process and keeping themselves always clean, they are really brāhmaṇa, śucīnāṁ.

And a sannyāsī is recommended to beg from the house of a brāhmaṇa. Caitanya Mahāprabhu used to do that, because a brāhmaṇa is always śuci; they are not unclean. But they . . . provided . . . otherwise it is not that one is born of a brāhmaṇa father but does not follow the rules and regulations—he is not a brāhmaṇa. He is called brahma-bandhu. He is called brahma-bandhu.

So here it is said, na vai sa narakaṁ yāti. So a devotee is never sinful, even if he has fallen down. Somehow or other, because māyā is very strong, he is not very mature and maybe attract . . . just like Ajāmila did. He was the son of a brāhmaṇa; he become attracted with a prostitute and fell down.

But again, he rose up simply by chanting. So simply if you keep yourself always chanting, there is no fear of falling down, neither you are eligible to go to the hellish condition of life, neither these constables of Yamarāja will come and see you. This is a part of the conclusion; we shall discuss it.