Leviticus 27:26
"But a firstborn of animals, which as a firstborn belongs to the LORD, no man may dedicate; whether ox or sheep, it is the LORD's.
Exodus 13:2
"Consecrate to me all the firstborn. Whatever is the first to open the womb among the people of Israel, both of man and of beast, is mine."
Exodus 13:12-13
you shall set apart to the LORD all that first opens the womb. All the firstborn of your animals that are males shall be the LORD's.
Exodus 22:30
You shall do the same with your oxen and with your sheep: seven days it shall be with its mother; on the eighth day you shall give it to me.
Numbers 18:17
But the firstborn of a cow, or the firstborn of a sheep, or the firstborn of a goat, you shall not redeem; they are holy. You shall sprinkle their blood on the altar and shall burn their fat as a food offering, with a pleasing aroma to the LORD.
Deuteronomy 15:19
"All the firstborn males that are born of your herd and flock you shall dedicate to the LORD your God. You shall do no work with the firstborn of your herd, nor shear the firstborn of your flock.