Exodus 12:10 KJV
And ye shall let nothing of it remain until the morning; and that which remaineth of it until the morning ye shall burn with fire.
Exodus 12:10, King James Version
In context
9 Eat not of it raw, nor sodden at all with water, but roast with fire; his head with his legs, and with the purtenance thereof.
10 And ye shall let nothing of it remain until the morning; and that which remaineth of it until the morning ye shall burn with fire.
11 And thus shall ye eat it; with your loins girded, your shoes on your feet, and your staff in your hand; and ye shall eat it in haste: it is the Lord’s passover.