Eating the Roasted Flesh by Night and Not Leaving It Over

"And they shall eat the flesh" (Exodus 12:8) -- and not the sinews, the bones, the horns, or the hooves. "On that night": I might hear it means all night long; Scripture teaches, "and you shall not leave any of it until morning" (Exodus 12:10). I would still read, "that which remains of it you shall burn in fire" -- so why is "until morning" stated? Scripture comes only to set a limit for the morning of the morning, and which is that? It is the rising of the dawn. From here they said: the eating of the Passover offerings and the eating of the sacrifices, their commanded time is until the rising of the dawn. And why did the Sages say until midnight? In order to keep a person far from transgression, and to make a fence around the Torah, and to fulfill the words of the Men of the Great Assembly, who used to say three things: be deliberate in judgment, raise up many disciples, and make a fence around the Torah.