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
And every firstling of an ass shalt thou ransom with a lamb; and if thou do not ransom it, thou shalt break its neck; and every firstborn of a man among thy sons shalt thou ransom.
Exodus 34:20
But the firstling of an ass thou shalt ransom with a lamb; and if thou ransom it not, then shalt thou break its neck. All the first-born of thy sons thou shalt ransom; and none shall appear before me empty.
Leviticus 27:27
But if it be of an unclean beast, then he shall ransom it according to thy valuation, and shall add a fifth of it thereto; and if it be not redeemed, it shall be sold according to thy valuation.

General references

Numbers 3:15
Number the sons of Levi according to their fathers' houses, after their families; every male from a month old and upward shalt thou number them.