Exodus 12:10-20

You must not leave any of it until morning;  any part of it left until morning you must burn. Here is how you must eat it: You must be dressed for travel,  your sandals on your feet, and your staff in your hand. You are to eat it in a hurry; it is the Lord’s Passover.  “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.  The 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. “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.  You 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. You 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. “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. You are to eat unleavened bread in the first month,  from the evening of the fourteenth day of the month until the evening of the twenty-first day. Yeast must not be found in your houses for seven days. If anyone eats something leavened, that person, whether a resident alien or native of the land, must be cut off from the community of Israel. Do not eat anything leavened; eat unleavened bread in all your homes.”