Exodus 12:8; Exodus 12:15; Exodus 12:19; Exodus 12:39

8 'They shall eat the flesh that same night, roasted with fire, and they shall eat it with unleavened bread and bitter herbs.

15 'Seven days you shall eat unleavened bread, but on the first day you shall remove leaven from your houses; for whoever eats anything leavened from the first day until the seventh day, that person shall be cut off from Israel.

19 'Seven days there shall be no leaven found in your houses; for whoever eats what is leavened, that person shall be cut off from the congregation of Israel, whether he is an alien or a native of the land.

39 They baked the dough which they had brought out of Egypt into cakes of unleavened bread. For it had not become leavened, since they were driven out of Egypt and could not delay, nor had they prepared any provisions for themselves.