Sayyiduna Sahl bin Sa’d (may Allah be pleased with him) narrates: There was a dispute among the people of Banu Amr bin Awf. The Prophet (peace and blessings of Allah be upon him) went to reconcile between them. The time for the Zuhr prayer arrived. He instructed Sayyiduna Bilal (may Allah be pleased with him): If the time for ‘Asr comes and I have not returned, then tell Abu Bakr to lead the people in prayer. When the time for the ‘Asr prayer came, Sayyiduna Bilal (may Allah be pleased with him) gave the adhan and the iqamah, and said: O Abu Bakr, please step forward. So Sayyiduna Abu Bakr (may Allah be pleased with him) stepped forward. Meanwhile, the Prophet (peace and blessings of Allah be upon him) arrived, making his way through the rows. When the people saw the Prophet (peace and blessings of Allah be upon him), they began clapping their hands. The narrator says: When Sayyiduna Abu Bakr (may Allah be pleased with him) would begin the prayer, he would not pay attention to anything else, but when he noticed the clapping continuing, he paid attention and saw that the Prophet (peace and blessings of Allah be upon him) was standing behind him. The Prophet (peace and blessings of Allah be upon him) gestured to him to continue the prayer, but Sayyiduna Abu Bakr (may Allah be pleased with him) stepped back, walking on his heels. When the Prophet (peace and blessings of Allah be upon him) noticed this, he moved forward and led the people in prayer. When he completed the prayer, he said: O Abu Bakr, what prevented you from continuing the prayer when I gestured to you? Sayyiduna Abu Bakr (may Allah be pleased with him) replied: It is not for the son of Abu Quhafah to lead the Messenger of Allah in prayer. Then the Prophet (peace and blessings of Allah be upon him) said to the people: When you need to draw the attention of the imam during prayer, men should say Subhan Allah and women should clap their hands.