Exodus 12:15; Exodus 13:3; Exodus 13:7; Exodus 23:18; Exodus 34:25

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.

3 Moses said to the people, "Remember this day in which you went out from Egypt, from the house of slavery; for by a powerful hand the LORD brought you out from this place. And nothing leavened shall be eaten.

7 "Unleavened bread shall be eaten throughout the seven days; and nothing leavened shall be seen among you, nor shall any leaven be seen among you in all your borders.

18 "You shall not offer the blood of My sacrifice with leavened bread; nor is the fat of My feast to remain overnight until morning.

25 "You shall not offer the blood of My sacrifice with leavened bread, nor is the sacrifice of the Feast of the Passover to be left over until morning.