Numbers 3:46

And as the redemption price for the 273 of the firstborn of the people of Israel, over and above the number of the male Levites,

Exodus 13:13

Every firstborn of a donkey you shall redeem with a lamb, or if you will not redeem it you shall break its neck. Every firstborn of man among your sons you shall redeem.

Numbers 18:15-16

Everything that opens the womb of all flesh, whether man or beast, which they offer to the LORD, shall be yours. Nevertheless, the firstborn of man you shall redeem, and the firstborn of unclean animals you shall redeem.

Treasury of Scripture Knowledge

Summary

And for those that are to be redeemed of the two hundred and threescore and thirteen of the firstborn of the children of Israel, which are more than the Levites;

Which are

General references

Bible References

Redeemed

Numbers 18:15
Everything that opens the womb of all flesh, whether man or beast, which they offer to the LORD, shall be yours. Nevertheless, the firstborn of man you shall redeem, and the firstborn of unclean animals you shall redeem.
Exodus 13:13
Every firstborn of a donkey you shall redeem with a lamb, or if you will not redeem it you shall break its neck. Every firstborn of man among your sons you shall redeem.

Which are

Numbers 3:39
All those listed among the Levites, whom Moses and Aaron listed at the commandment of the LORD, by clans, all the males from a month old and upward, were 22,000.

General references

Numbers 3:50
From the firstborn of the people of Israel he took the money, 1,365 shekels, by the shekel of the sanctuary.

The Holy Bible, English Standard Version® copyright © 2001 by Crossway Bibles, a publishing ministry of Good News Publishers.