Deuteronomy 16:3-5

Common English Bible

³ You must not eat anything containing yeast along with it.^[a] Instead, for seven days you must eat unleavened bread, bread symbolizing misery, along with it because you fled Egypt in a great hurry. Do this so you remember the day you fled Egypt for as long as you live. ⁴ No dough with yeast should appear in any of your territory for seven days. Furthermore, none of the meat that you sacrificed on the first night should remain until morning. ⁵ You are not permitted to offer the Passover sacrifice in any of the cities that the Lord your God is giving you.