Exodus 12:6-10

6and ye shall keep it until the fourteenth day of the same month; and the whole assembly of the congregation of Israel shall kill it at even.

7And they shall take of the blood, and put it on the two side-posts and on the lintel, upon the houses wherein they shall eat it.

8And they shall eat the flesh in that night, roast with fire, and unleavened bread; with bitter herbs they shall eat it.

9Eat not of it raw, nor boiled at all with water, but roast with fire; its head with its legs and with the inwards thereof.

10And ye shall let nothing of it remain until the morning; but that which remaineth of it until the morning ye shall burn with fire.