Exodus 12:8

Your lamb shall be without defect, a male a year old. You shall take it from the sheep or from the goats.

You shall keep it until the fourteenth day of the same month; and the whole assembly of the congregation of Israel shall kill it at evening.

They shall take some of the blood, and put it on the two door posts and on the lintel, on the houses in which they shall eat it.

Don’t eat it raw, nor boiled at all with water, but roasted with fire; with its head, its legs and its inner parts.

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

This is how you shall eat it: with your belt on your waist, your sandals on your feet, and your staff in your hand; and you shall eat it in haste: it is the LORD’s Passover.