Exodus 12:11-15

Now you shall eat it in this way: with your garment belted around your waist, your sandals on your feet, and your staff in your hand; and you shall eat it in a hurry—it is the Lord’s Passover.

For I will go through the land of Egypt on that night, and fatally strike all the firstborn in the land of Egypt, from the human firstborn to animals; and against all the gods of Egypt I will execute judgments—I am the Lord.

The blood shall be a sign for you on the houses where you live; and when I see the blood I will pass over you, and no plague will come upon you to destroy you when I strike the land of Egypt. Feast of Unleavened Bread

‘Now this day shall be a memorial to you, and you shall celebrate it as a feast to the Lord; throughout your generations you are to celebrate it as a permanent ordinance.

For seven days you shall eat unleavened bread, but on the first day you shall remove dough with yeast from your houses; for whoever eats anything with yeast from the first day until the seventh day, that person shall be cut off from Israel.