It is narrated from Sayyiduna Ibn Mas'ud (may Allah be pleased with him) that on the day of the Battle of the Trench, the polytheists kept the Prophet (peace and blessings be upon him) so occupied that he was unable to perform four prayers at their prescribed times. This weighed heavily on me, that we were with the Prophet (peace and blessings be upon him), in the path of Allah (yet our prayers were missed). Then the Prophet (peace and blessings be upon him) ordered Sayyiduna Bilal (may Allah be pleased with him), so he gave the call to prayer (adhan), then the call to commence (iqamah), and the Prophet (peace and blessings be upon him) led the Zuhr prayer. Then, after the iqamah, he led the Asr prayer. Then, after the iqamah, he led the Maghrib prayer. Then, after having the iqamah called, he led the Isha prayer. Then he came to us and said: "At this moment, there is no group on the face of the earth, besides you, that is remembering Allah."