leaven

Exodus 12:20
You are not to eat anything leavened; eat unleavened bread in all your homes."

Exodus 23:18
You must not offer the blood of My sacrifices with anything leavened, nor may the fat of My feast remain until morning.

Deuteronomy 16:3
You must not eat leavened bread with it; for seven days you are to eat with it unleavened bread, the bread of affliction, because you left the land of Egypt in haste--so that you may remember for the rest of your life the day you left the land of Egypt.

1 Corinthians 5:7, 8
Get rid of the old yeast, that you may be a new unleavened batch, as you really are. For Christ, our Passover lamb, has been sacrificed. . . .

be left

Exodus 12:10
Do not leave any of it until morning; before the morning you must burn up any part that is left over.

Exodus 23:18
You must not offer the blood of My sacrifices with anything leavened, nor may the fat of My feast remain until morning.

Exodus 29:34
And if any of the meat of ordination or any bread is left until the morning, burn up the remainder. It must not be eaten, because it is sacred.

Leviticus 7:15
The meat of the sacrifice of his thanksgiving peace offering must be eaten on the day he offers it; none of it may be left until morning.

Numbers 9:12
they may not leave any of it until morning or break any of its bones. They must observe the Passover according to all its statutes.