Prabhupāda: Another animal sacrifice is there just to make experiment of the Vedic mantra. An animal is sacrificed in the altar, and he is given again life, rejuvenated life. An old cow sacrificed, and he gets a youth, young (body). If the animal comes out alive, then it is to be considered that the Vedic mantras are being recited correctly. Not to kill and eat, no, no, that is not the purpose. Just like in laboratories, they make some experiment on the animal, similarly this is like that. The animal is sacrificed, and he is rejuvenated in young life. Old life is sacrificed, and he gets a new body. Then it is to be understood that in this ritualistic ceremony the mantras are chanted correctly. That is their power. But because in this age such learned brāhmaṇas are not available, therefore it is stopped. No more. There is a verse in the Purāṇas,
- aśvamedhaṁ gavālambhaṁ
- sannyāsaṁ pala-paitṛkam
- devareṇa sutotpattiṁ
- kalau pañca vivarjayet
- (CC Adi 17.164)
In this age of Kali, five things should be avoided: one is performing sacrifice by offering cows; performing sacrifice by offering horse; and oblation offering to the forefathers with meat; and then to get child by the husband's younger brother. Maybe it was practiced formerly. According to Vedic rituals, the husband's wife... That is permanent relation; there is no divorce, nothing of the sort. But in case of the husband being sick or dead, the women was allowed, if she has no children, to get children by the husband's younger brother. Devareṇa. That is also now not allowed. So these five things are not allowed in this age, Kali-yuga: sacrifice offering cows, sacrifice offering horse, sannyāsa—renouncing family life—sannyāsa order, offering oblations with meat to the forefathers, and begetting children through the husband's younger... These five items are forbidden.