Exodus 22:30
so thou dost to thine ox, to thy sheep; seven days it is with its dam, on the eighth day thou dost give it to Me.
Leviticus 22:27
'When ox or lamb or goat is born, and it hath been seven days under its dam, then from the eighth day and henceforth, it is pleasing for an offering, a fire-offering to Jehovah;
Deuteronomy 15:19
Every firstling that is born in thy herd and in thy flock -- the male thou dost sanctify to Jehovah thy God; thou dost not work with the firstling of thine ox, nor shear the firstling of thy flock;
Exodus 13:12
that thou hast caused every one opening a womb to pass over to Jehovah, and every firstling -- the increase of beasts which thou hast: the males are Jehovah's.
Leviticus 12:3
and in the eighth day is the flesh of his foreskin circumcised;