Exodus 22:29–31
29 “You shall not delay to offer from the fulness of your harvest and from the outflow of your presses.
“The first-born of your sons you shall give to me. 30 You shall do likewise with your oxen and with your sheep: seven days it shall be with its dam; on the eighth day you shall give it to me.
31 “You shall be men consecrated to me; therefore you shall not eat any flesh that is torn by beasts in the field; you shall cast it to the dogs.