Similarly, [if] someone left Jerusalem and remembered that he had sacrificial meat in his hand —- if he has passed Tzofim, he burns it where he is; but if not, he [must] return and burn it before the Temple with the wood of the [altar] pyre.  And for how much [chametz or meat] must they return? — R' Meir says: In either case, [when there is] as much as an egg; R' Yehudah says: In either case, [when there is] as much as an olive. but the Sages say: [For] sacrificial meat, as much as an olive, but [for] chametz, as much as an egg.