Exodus 12:14-20

14And this day will be a memorial for you, and you are to celebrate it as a feast to the LORD, as a permanent statute for the generations to come. 15For seven days you must eat unleavened bread. On the first day you are to remove the leaven from your houses. Whoever eats anything leavened from the first day through the seventh must be cut off from Israel.

16On the first day you are to hold a sacred assembly, and another on the seventh day. You must not do any work on those days, except to prepare the meals—that is all you may do.

17So you are to keep the Feast of Unleavened Bread,1 for on this very day I brought your divisions out of the land of Egypt. You must keep this day as a permanent statute for the generations to come. 18In the first month you are to eat unleavened bread, from the evening of the fourteenth day until the evening of the twenty-first day. 19For seven days there must be no leaven found in your houses. If anyone eats something leavened, that person, whether a foreigner or native of the land, must be cut off from the congregation of Israel. 20You are not to eat anything leavened; eat unleavened bread in all your homes.”