Four regulative principles (Books)
Appearance
Srimad-Bhagavatam
SB Canto 4
One is not accepted as a bona fide student in this movement unless he promises to follow the four regulative principles: no animal-killing, no intoxication, no illicit sex and no gambling.
SB 4.26.5, Purport: In the Kṛṣṇa consciousness movement, animal-killing is completely prohibited. One is not accepted as a bona fide student in this movement unless he promises to follow the four regulative principles: no animal-killing, no intoxication, no illicit sex and no gambling. This Kṛṣṇa consciousness movement is the only means by which the sinful activities of men in this Kali-yuga can be counteracted.