Adurbad-i Mahrspandan

"Abstain rigorously from eating the flesh of cows and all beneficent animals, lest you be made to face a strict reckoning in this world and the next; for by eating the flesh of cows and other domestic animals, you involve your hand in sin, and thereby think, speak, and do what is sinful; for though you may eat but a mouthful, you involve your hand in sin, and though a camel be slain by another person in another place, it is as if you who eat its flesh had slain it with your own hand."