Numbers 3:46

The English Standar Version

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,

Cross References

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.

Exodus 13:15

For when Pharaoh stubbornly refused to let us go, the LORD killed all the firstborn in the land of Egypt, both the firstborn of man and the firstborn of animals. Therefore I sacrifice to the LORD all the males that first open the womb, but all the firstborn of my sons I redeem.'