It is narrated from Sayyiduna Ibn Mas'ud (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) was returning from Hudaybiyyah at night. We camped on soft ground. The Prophet (peace and blessings be upon him) said: "Who will keep watch over us? (Who will wake us up for Fajr?)" I offered myself. The Prophet (peace and blessings be upon him) said: "What if you also fall asleep?" I replied: I will not sleep. After repeating this several times, the Prophet (peace and blessings be upon him) appointed me, and I began to keep watch. But when morning came, as the Prophet (peace and blessings be upon him) had said, "You will also fall asleep," my eyes too closed until the sun had risen. The Prophet (peace and blessings be upon him) also woke up and performed ablution and the Sunnah of Fajr as he used to do, then led us in the Fajr prayer. After finishing, he said: "If Allah had willed that you would not sleep, you would never have slept. But it was Allah's will that you become a leader for those who come after. Therefore, if anyone sleeps through the time of prayer or forgets it, he should do as you have done." The narrator says that then the Prophet's (peace and blessings be upon him) camel and the people's camels scattered. People went out to search for them, and all the camels except the Prophet's (peace and blessings be upon him) were found. The Prophet (peace and blessings be upon him) said to me: "Go there and search." I reached the relevant place and saw that its halter was entangled in a tree, which could easily be untied by hand. I brought it to the Prophet (peace and blessings be upon him) and said: O Messenger of Allah (peace and blessings be upon him)! By the One who sent you with the truth, I saw its halter entangled in the tree, which could easily be untied by hand. Then Surah Al-Fath was revealed to the Prophet (peace and blessings be upon him).