Exodus 13:12-14 Douay-Rheims 1899 American Edition (DRA)
12 Thou shalt set apart all that openeth the womb for the Lord, and all that is first brought forth of thy cattle: whatsoever thou shalt have of the male sex, thou shalt consecrate to the Lord.
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.