Exodus 12:12-17

12“I will pass through the land of Egypt on that night and strike every firstborn male in the land of Egypt, both people and animals. I am the Lord; I will execute judgments against all the gods of Egypt.

13The blood on the houses where you are staying will be a distinguishing mark for you; when I see the blood, I will pass over you. No plague will be among you to destroy you when I strike the land of Egypt.

14“This day is to be a memorial for you, and you must celebrate it as a festival to the Lord. You are to celebrate it throughout your generations as a permanent statute.

15You must eat unleavened bread for seven days. On the first day you must remove yeast from your houses. Whoever eats what is leavened from the first day through the seventh day must be cut off from Israel.

16You are to hold a sacred assembly on the first day and another sacred assembly on the seventh day. No work may be done on those days except for preparing what people need to eat — you may do only that.

17“You are to observe the Festival of Unleavened Bread because on this very day I brought your military divisions out of the land of Egypt. You must observe this day throughout your generations as a permanent statute.