In Bukhari:V9 N316, Jabir ibn 'Abdullah narrated that a Bedouin accepted Islam and then when he got a fever he demanded that Muhammad to cancel his pledge (allow him to renounce Islam). Muhammad refused to do so. The Bedouin man repeated his demand once, but Muhammad once again refused. Then, he (the Bedouin) left Medina. Muhammad said, "Madinah is like a pair of bellows (furnace): it expels its impurities and brightens and clear its good." In this narration, there was no evidence demonstrating that Muhammad ordered the execution of the Bedouin for wanting to renounce Islam.