Exodus 13:1-5

Then the Lord spoke to Moses, saying,

“Sanctify to Me every firstborn, the firstborn of every womb among the sons of Israel, among people and animals alike; it belongs to Me.”

And Moses said to the people, “Remember this day in which you departed from Egypt, from the house of slavery; for by a powerful hand the Lord brought you out from this place. And nothing with yeast shall be eaten.

On this day in the month of Abib, you are about to go out from here.

And it shall be when the Lord brings you to the land of the Canaanite, the Hittite, the Amorite, the Hivite, and the Jebusite, which He swore to your fathers to give you, a land flowing with milk and honey, that you shall perform this rite in this month.