One who slept while on a journey and did not know that it had become dark has two thousand cubits in every direction — [these are] the words of R’ Yochanan ben Nuri. But the Sages say: He has only four cubits. R’ Eliezer says: And he is in their midst. R’ Yehudah says: He may go in any direction he wishes. Yet R’ Yehudah agrees that once he chooses for himself, he cannot retract.