These things pertaining to the pesach-offering override the Sabbath: its slaughter; throwing of its blood; removal [of the offal] from its entrails; and the burning of its fats. But its roasting and the rinsing of its entrails do not override the Sabbath.  Carrying it, bringing it from outside the Sabbath limit, and cutting off its wart do not override the Sabbath;  R' Eliezer says: They do override [it].