15 Every thing that openeth the matrix in all flesh, which they bring to the LORD, whether of men or beast, shall be thine: nevertheless, the first born of man shalt thou surely redeem, and the firstling of unclean beasts shalt thou redeem.
Numbers 18:15 Cross References - Webster
Exodus 13:2
2 Sanctify to me all the first-born, whatever openeth the womb among the children of Israel, both of man and of beast: it is mine.
Exodus 13:12-13
12 That thou shall set apart to the LORD all that openeth the matrix; and every firstling that cometh of a beast which thou hast, the males shall be the LORD'S.
13 And every firstling of an ass thou shalt redeem with a lamb; and if thou wilt not redeem it, then thou shalt break his neck: and all the first-born of man among thy children shalt thou redeem.
Exodus 22:29
29 Thou shalt not delay to offer the first of thy ripe fruits, and of thy liquors: the first-born of thy sons shalt thou give to me.
Exodus 34:20
20 But the firstling of an ass thou shalt redeem with a lamb: and if thou shalt not redeem him, then shalt thou break his neck. All the first-born of thy sons thou shalt redeem. And none shall appear before me empty.
Leviticus 27:26-27
26 Only the firstling of the beasts, which should be the LORD'S firstling, no man shall sanctify it; whether ox, or sheep: it is the LORD'S.
27 And if it shall be of an unclean beast, then he shall redeem it, according to thy estimation, and shall add to it a fifth part of it: or if it shall be not redeemed, then it shall be sold according to thy estimation.
Numbers 3:13
13 Because all the first-born are mine; for on the day that I smote all the first-born in the land of Egypt, I hallowed to me all the first-born in Israel, both man and beast: mine they shall be: I am the LORD.
Numbers 3:46
46 And for those that are to be redeemed of the two hundred and seventy and three, of the first-born of the children of Israel, which are more than the Levites: