Numbers 18:15

every thing that is born first of all flesh that may be offered unto Yahweh among men and among beasts, shall be thine, - only thou shalt, redeem, the firstborn of men, and the firstborn of unclean beasts, shalt thou redeem.

Exodus 34:20

But the firstling of an ass, thou mayst redeem with a lamb, and if thou wilt not redeem it, then shalt thou break its neck. Every firstborn of thy sons, shalt thou redeem, and he must not see my face, with empty hand.

Exodus 13:2

Hallow to me every firstborn, that which any female first beareth among the sons of Israel, among men and among beasts, - mine! it is.

Exodus 13:12-13

that thou shalt set apart whatsoever is born first, to Yahweh; and, of all firstlings of beasts which thou shalt have, the males, shall pertain to Yahweh.

Exodus 22:29

Thy fulness and thine outflow, shalt thou not delay, - the firstborn of thy sons, shalt thou give to me.

Leviticus 27:26-27

Only the firstling which is born a firstling to Yahweh, among beasts, no man shall hallow it, - whether ox or sheep, unto Yahweh, it belongeth.

Numbers 3:13

for, mine, is every firstborn, in the day when I smote every firstborn in the land of Egypt, hallowed unto myself every firstborn in Israel, both of man and of beast, - mine, did they become, and belong unto me, Yahweh.

Numbers 3:46

and as the ransom of the two hundred and seventy-three, - who are mere than the Levites, of the firstborn of the sons of Israel,

Treasury of Scripture Knowledge

Summary

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.

General references

Bible References

The firstborn

Exodus 13:13
But every firstling of an ass, shalt thou redeem with a lamb or if thou wilt not redeem it, then thou shalt break its neck, - but every firstborn of men among thy sons, shalt thou redeem.
Exodus 34:20
But the firstling of an ass, thou mayst redeem with a lamb, and if thou wilt not redeem it, then shalt thou break its neck. Every firstborn of thy sons, shalt thou redeem, and he must not see my face, with empty hand.
Leviticus 27:27
But, if it be among the beasts that are unclean, then shall he ransom it by thine estimate, and add the fifth part of it thereunto, - but, if it is not redeemed, then shall it be sold by thine estimate.

General references

Numbers 3:15
Number thou the sons of Levi, by their ancestral houses, by their families, - every male, from one month old and upwards, shalt thou number them.