Deuteronomy 16:3-5

International Standard Version

³ You must not eat any yeast with it. Instead, for seven days eat bread without yeast—the bread of affliction—because you left the land of Egypt in haste. Remember the day you went out of the land of Egypt for the rest of your lives. ⁴ Yeast is not to be seen in any of your territories for seven days. The meat is not to remain from the evening of the first day until morning.

⁵ “You must not sacrifice the Passover in just any of your cities^[a] that the Lord your God is about to give you.