At each booth they would say to him, “Here is food and here is drink”; and they would accompany him from [that] booth to [the next] booth, except for the last of them. For the [last] escort could not go with him [all the way] to the precipice, but would stand from afar and observe his actions.

What did he do? He parted the strip of red wool; half of it he tied to the rock and half he tied between its two horns, and pushed it backwards. It tumbled down, and before it reached halfway down the mountain, it was torn limb from limb. He would return and sit under the [shade of the] last booth until it became dark.  And from when does he contaminate clothing? As soon as he gets outside the wall of Jerusalem. R' Shimon says: From the time he pushes him [down] to the precipice.