Exodus 22:30
Likewise you shall do with your oxen and with your sheep; it shall be with its dam seven days. On the eighth day you shall give it to Me.
Leviticus 22:27
When a bull or a lamb or a goat is brought forth, then it shall be seven days under the dam. And from the eighth day and from then on, it shall be accepted for a fire offering to Jehovah.
Deuteronomy 15:19
All the first-born males that come from your herd and from your flock, you shall set apart to Jehovah your God. You shall do no work with the first-born of your bull, nor shear the first-born of your sheep.
Exodus 13:12
you shall set apart to Jehovah every one that opens the womb, and every first-born that comes of any animal which you have; the males shall be Jehovah's.
Leviticus 12:3
And in the eighth day the flesh of his foreskin shall be circumcised.