Ye shall let nothing of it remain until the morning— If the guests were not sufficient to eat up the whole lamb, what remained in the morning was then to be consumed in the fire. The verse might be rendered, ye shall let nothing it remain until the morning; but if any shall happen to remain, ye shall burn it with fire: an order, which seems to have been given, to prevent things sacred from being corrupted, or being esteemed as common: and, probably, in opposition to the practices of those idolaters, who used to preserve relics of the sacrifices for superstitious and abominable uses. See ch. Exodus 29:34.
Related Commentaries of Exodus 12:10
Exodus 12:10
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.