Exodus 13:13-15

Douay-Rheims 1899 American Edition

¹³ The firstborn of an ass thou shalt change for a sheep: and if thou do not redeem it, thou shalt kill it. And every firstborn of men thou shalt redeem with a price.

¹⁴ And when thy son shall ask thee to morrow, saying: What is this? thou shalt answer him: With a strong hand did the Lord bring us forth out of the land of Egypt, out of the house of bondage.

¹⁵ For when Pharao was hardened, and would not let us go, the Lord slew every firstborn in the land of Egypt, from the firstborn of man to the firstborn of beasts: therefore I sacrifice to the Lord all that openeth the womb of the male sex, and all the firstborn of my sons I redeem.