Exodus 12:18-20 ▼

18 In the first [month], on the fourteenth day of the month, in the evening, you eat unleavened things until the twenty-first day of the month, at evening;

19 seven days leaven is not found in your houses, for anyone eating anything fermented—that person has been cut off from the congregation of Israel, among the sojourners or among the natives of the land;

20 you do not eat anything fermented—in all your dwellings you eat [only] unleavened things.”