Exodus 12:8-11

They shall eat the flesh that same night, roasted with fire, and they shall eat it with unleavened bread and bitter herbs. Do not eat any of it raw or boiled at all with water, but rather roasted with fire, both its head and its legs along with its entrails. And you shall not leave any of it over until morning, but whatever is left of it until morning, you shall completely burn with fire. Now you shall eat it in this way: with your garment belted around your waist, your sandals on your feet, and your staff in your hand; and you shall eat it in a hurry—it is the LORD’S Passover.