No leaven is to be found in all your land for seven days, and none of the meat you sacrifice in the evening of the first day shall remain until morning.

Matthew 13:33
He told them still another parable: "The kingdom of heaven is like leaven that a woman took and mixed into three measures of flour, until all of it was leavened."

Exodus 12:6
You must keep it until the fourteenth day of the month, when the whole assembly of the congregation of Israel will slaughter the animals at twilight.

Exodus 12:8
They are to eat the meat that night, roasted over the fire, along with unleavened bread and bitter herbs.

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 34:25
Do not offer the blood of a sacrifice to Me along with anything leavened, and do not let any of the sacrifice from the Passover Feast remain until morning.

Deuteronomy 16:5
You are not to sacrifice the Passover animal in any of the towns that the LORD your God is giving you.

And there shall be no leavened bread seen with you in all your coast seven days; neither shall there any thing of the flesh, which you sacrificed the first day at even, remain all night until the morning.