Exodus 34:25

¹⁸“You shall not offer the blood of my sacrifice with leavened bread. The fat of my feast shall not remain all night until the morning.

¹⁰You shall let nothing of it remain until the morning; but that which remains of it until the morning you shall burn with fire.

⁷Purge out the old yeast, that you may be a new lump, even as you are unleavened. For indeed Christ, our Passover, has been sacrificed in our place. ⁸Therefore let’s keep the feast, not with old yeast, neither with the yeast of malice and wickedness, but with the unleavened bread of sincerity and truth.

³You shall eat no leavened bread with it. You shall eat unleavened bread with it seven days, even the bread of affliction (for you came out of the land of Egypt in haste) that you may remember the day when you came out of the land of Egypt all the days of your life.

⁸They shall eat the meat in that night, roasted with fire, with unleavened bread. They shall eat it with bitter herbs.

²⁰You shall eat nothing leavened. In all your habitations you shall eat unleavened bread.’”

¹²They shall leave none of it until the morning, nor break a bone of it. According to all the statute of the Passover they shall keep it.

¹⁵The flesh of the sacrifice of his peace offerings for thanksgiving shall be eaten on the day of his offering. He shall not leave any of it until the morning.

³⁴If anything of the meat of the consecration, or of the bread, remains to the morning, then you shall burn the remainder with fire. It shall not be eaten, because it is holy.