Sayyiduna Aws (may Allah be pleased with him) reports: We were sitting with the Messenger of Allah (peace and blessings be upon him) while he (peace and blessings be upon him) was admonishing and exhorting us, when a man suddenly came to him (peace and blessings be upon him) and asked him (peace and blessings be upon him) something. At this the Messenger of Allah (peace and blessings be upon him) said: "Go and kill him." When the man turned to go back, the Messenger of Allah (peace and blessings be upon him) called him and asked: "Do you bear witness that there is none worthy of worship but Allah?" He said: "Yes." He (peace and blessings be upon him) said: "Go and leave his way clear, for I have been commanded to fight the people until they recite La ilaha illa Allah (there is none worthy of worship but Allah). When they have done so, their lives and their wealth have become inviolable to me."