15 every one opening a womb of all flesh which they offer to Jehovah, among man and among animal, shall be yours. Only, you shall certainly redeem the first-born of man, and you shall redeem the firstling of the unclean beasts.
Numbers 18:15 Cross References - LITV
Exodus 13:2
2 Set apart to Me every first-born, the one Opening the womb among the sons of Israel, among men and among livestock; they shall be Mine.
Exodus 13:12-13
12 you shall set apart to Jehovah every one opening the womb, and every firstling, the offspring of animals which are yours; the males are Jehovah's.
13 And every firstling of an ass you shall redeem with a flock animal. And if you do not redeem, you shall break its neck. And every first-born of men among your sons you shall redeem.
Exodus 22:29
29 You shall not delay giving your harvest and your vintage. You shall give to Me the first born of your sons.
Exodus 34:20
20 and a firstling of an ass, you shall redeem with a lamb. And if you do not redeem, you shall break its neck. You shall redeem every first-born of your sons, and they shall not be seen before My face empty.
Leviticus 27:26-27
26 However, no man shall dedicate a firstling, which is first-born to Jehovah among animals, whether ox or sheep; it is Jehovah's.
27 And if among the unclean animals, then he shall ransom it at your valuation, and he shall add its fifth to it. And if it is not redeemed, then it shall be sold at your evaluation.
Numbers 3:13
13 For every first-born is Mine, from the day I struck every first-born in the land of Egypt, I have set apart to Myself every first-born in Israel, from men to animal. They are Mine. I am Jehovah.
Numbers 3:46
46 And from those redeemed of the two hundred and seventy three who are more than the Levites, of the first-born of the sons of Israel,