Ṣaḥīḥ al-Bukhārī & Ṣaḥīḥ Muslim

Jābir (may Allah be pleased with him) reported that he proceeded in the Prophet's company towards Najd to participate in a battle. When the Messenger (may Allah's peace and blessings be upon him) returned, he too returned with him. Midday came upon them while they were in a valley having many thorny trees. The Prophet and the people dismounted and dispersed to rest in the shade of the trees. The Prophet (may Allah's peace and blessings be upon him) rested under a tree and hung his sword on it. We all took a nap and suddenly we heard the Prophet (may Allah's peace and blessings be upon him) calling us. (We woke up) to see a Bedouin with him. The Prophet (may Allah's peace and blessings be upon him) said: "This Bedouin took out my sword while I was sleeping and when I woke up, I found the unsheathed sword in his hand and he challenged me saying: 'Who will save you from me?' I said thrice: 'Allah.'" The Prophet (may Allah's peace and blessings be upon him) did not punish him but sat down.

In another narration: The sword fell from the disbeliever's hand, whereupon the Prophet took it and said: "And who can protect you if I want to kill you?" The man replied: "Return evil with good." The Prophet (may Allah's peace and blessings be upon him) said: "Would you bear witness that there is no god but Allah and I am the Messenger of Allah?" He replied in the negative, but pledged not to fight the Prophet again or join people who fight him. So, the Prophet released him, and he came back to his companions and said: "I have just been with the most excellent among people."