Exodus 34:18-20

International Standard Version

¹⁸ “You are to observe the Festival of Unleavened Bread. For seven days, at the appointed time in the month Abib, you are to eat unleavened bread as I commanded you, for in the month Abib you came out of Egypt.

¹⁹ “Everything firstborn^[a] belongs to me: all the males of your herds, the firstborn of both cattle and sheep. ²⁰ You are to redeem the firstborn of a donkey with a sheep, and if you don’t redeem it, you are to break its neck. You are to redeem every firstborn of your sons, and no one is to appear before me empty-handed.