Exodus 34:18-20

World English Bible

¹⁸ “You shall keep the feast of unleavened bread. Seven days you shall eat unleavened bread, as I commanded you, at the time appointed in the month Abib; for in the month Abib you came out of Egypt.

¹⁹ “All that opens the womb is mine; and all your livestock that is male, the firstborn of cow and sheep. ²⁰ You shall redeem the firstborn of a donkey with a lamb. If you will not redeem it, then you shall break its neck. You shall redeem all the firstborn of your sons. No one shall appear before me empty.