Numbers 18:15

Every thing cleaving the womb for all flesh, which they shall bring to Jehovah, in man or in cattle, shall be to thee: but redeeming, thou shalt redeem the first-born of man, and the firstborn of unclean cattle thou shalt redeem.

Exodus 34:20

And the first-born of the ass thou shalt redeem with a sheep: and if thou shalt not ransom, thou shalt break his neck. Every first-born of thy sons thou. shalt ransom, and he shall not be seen before me empty.

Exodus 13:2

Consecrate to me every first-born bursting open every womb among the sons of Israel, of man and of cattle: it is to me.

Exodus 13:12-13

And thou madest pass over all bursting open the womb, to Jehovah; and every one bursting forth young of the quadruped which shall be to thee; the males are to Jehovah.

Exodus 22:29

Thy fulness and thy tears thou shalt not delay: the first-born of thy sons thou shalt give to me.

Leviticus 27:26-27

But the first-born which shall be first to Jehovah among the cattle, a man shall not consecrate it; if an ox, if a sheep, it is to Jehovah.

Numbers 3:13

For to me all the first-born: in the day I struck all the first-born in the land of Egypt, I consecrated to me every first-born in Israel, from man to cattle: to me they shall be: I am Jehovah.

Numbers 3:46

And the price of redemption of the three and seventy and two hundred, of those remaining over the Levites, from the first-born of the sons of Israel:

Treasury of Scripture Knowledge

Summary

Numbers 18:15

Every thing that openeth the matrix in all flesh, which they bring unto the LORD, whether it be of men or beasts, shall be thine: nevertheless the firstborn of man shalt thou surely redeem, and the firstling of unclean beasts shalt thou redeem.

The firstborn

Exodus 13:13

Exodus 34:20

Leviticus 27:27

General references

Numbers 3:15

Bible References

The firstborn

And every first-born of the ass, thou shalt redeem with a sheep; and if thou shalt not redeem, thou shalt break his neck: and every first-born of man among thy sons thou shalt redeem.

And if from unclean cattle, and he redeemed by thy estimation, and he shall add the fifth upon it: and if it shall not be redeemed, and it was sold by thy estimation.

General references

Review the sons of Levi according to the house of their fathers, according to their families: every male from the son of a month and above shalt thou review them.