It is narrated from Sayyiduna Sa'id bin al-Musayyib (may Allah be pleased with him) that when the Messenger of Allah (peace and blessings of Allah be upon him) returned from the Battle of Khaybar, he traveled at night. When the last part of the night came, he (peace be upon him) dismounted and said to Sayyiduna Bilal (may Allah be pleased with him): "Take care of the morning prayer." Then the Messenger of Allah (peace be upon him) slept, and Sayyiduna Bilal (may Allah be pleased with him) stayed awake as long as Allah willed. Then Sayyiduna Bilal (may Allah be pleased with him) leaned against his camel and turned his face towards the direction of the morning, and his eyes became heavy with sleep. Neither the Messenger of Allah (peace be upon him) nor Sayyiduna Bilal (may Allah be pleased with him) nor any of the camel riders woke up, until the heat of the sun struck them. Then the Messenger of Allah (peace be upon him) woke up startled and said: "What is this, O Bilal!" Sayyiduna Bilal (may Allah be pleased with him) said: "The same thing overpowered me that overpowered you (i.e., sleep)." The Messenger of Allah (peace be upon him) said: "Move on." So the people loaded their saddles. After traveling a short distance, the Messenger of Allah (peace be upon him) ordered Sayyiduna Bilal (may Allah be pleased with him) to give the call to prayer. So Sayyiduna Bilal (may Allah be pleased with him) gave the call to prayer, and then the Messenger of Allah (peace be upon him) led the morning prayer. After he had finished the prayer, he said: "Whoever forgets a prayer should pray it when he remembers it, for Allah the Exalted says: 'Establish the prayer when you remember Me.'"