R. Yehoshua says: Towards evening you sacrifice it. When the sun sets, you start eating it. Until when (do you eat it)? Until the time of your leaving Egypt (i.e., at the rising of the morning star.)
(Devarim 16:9) "And you shall cook it and eat it, in the place, etc.": We are hereby taught that if pieces of it fell (from the oven), it is returned (to the oven) whole, and not piece by piece. These are the words of R. Yehudah. R. Yossi says: On the Sabbath, in any event it is forbidden. On yom tov, in any event it is permitted.