Exodus 12:18-20 ▼

18 In the first month, on the fourteenth day of the month at evening, you shall eat unleavened bread, until the twenty-first day of the month at evening.

19 For seven days there shall be no dough with yeast found in your houses; for whoever eats anything with yeast, that person shall be cut off from the congregation of Israel, whether he is a stranger or a native of the land.

20 You shall not eat anything with yeast; in all your dwellings you shall eat unleavened bread.’”