Once, they did not enter the harbor until night had fallen. They asked Rabban Gamliel: ‘‘May we disembark?’’ He answered them: ‘‘You are permitted, for I had been observing and we were within the techum before dark.’’

If one left with permission and they said to him: ‘‘The act has already been done,’’ he has two thousand cubits in every direction. If he was within the techum, it is as if he did not leave. [And] all those leaving to save [people] may return to their places.