What did Prophet Muhammad (saw) witness when Sa`id bin Zaid and 'Umar's sister were forced to leave Islam?
 Narrated Qais:                     I heard Sa`id bin Zaid saying to the people, "If you but saw me and `Umar's sister tied and forced by `Umar to leave Islam while he was not yet a Muslim. And if the mountain of Uhud could move from its place for the evil which you people have done to `Uthman, it would have the right to do that."