Exodus 22:30
Thus shalt thou do to thine ox, to thy sheep: seven days shall it be with its mother; in the eighth day thou shalt give it to me.
Leviticus 22:27
When a calf or lamb, or goat, shall be brought forth, it shall be seven days under its mother; and from the eighth day and beyond, it shall be accepted for an offering, a sacrifice to Jehovah.
Deuteronomy 15:19
All the first-born that shall be brought forth among thy cattle and among thy sheep, the male thou shalt consecrate to Jehovah thy God: thou shalt not work with the first-born of thy bullock, and thou shalt not shear first-born of thy sheep.
Exodus 13:12
And thou madest pass over all bursting open the womb, to Jehovah; and every one bursting forth young of the quadruped which shall be to thee; the males are to Jehovah.
Leviticus 12:3
And in the eighth day the flesh of his uncircumcision shall be circumcised.