Sahl bin Sa'd said:

"There was some fighting among Banu 'Amr bin 'Ad, and news of that reached the Prophet ﷺ. He prayed Zuhr, then he went to them to reconcile between them. Then he said to Bilal: '0 Bilal, if the time for Asr comes and I have not come back, then tell Abu Bakr to lead the people in prayer.' When thetime (for Asr) came, Bilil called the A&Bn, then the Iqimh, then he said to Abu Bakr: 'Go forward. So Abu Bakr went forward and started to pray. Then the Messenger of Allah ﷺ came and started passing through the rows of people until he stood behind Abu Bakr, and the people clapped. Abu Bakr was such that whenever he started praying, he would never glance sideways, but when he noticed that the clapping persisted he turned around. The Messenger of Allahﷺ gestured to him to carry on praying. Abu Bakr praised Allah the Mighty and Sublime for the Messenger of Allah ﷺ having told him to continue. Then Abu Bakr moved backward on his heels, and when the Messenger of Allahﷺ saw that, he came foiward and led the people in prayer. When he completed the prayer he said: '0Abu Bakr, when I gestured to you, what kept you from continuing (to lead the people)?' He said: 'It does not befit the son of Abu Quhafah to lead the Messenger of Alliah ﷺ in prayer.' And he (the Prophet) said to the people: 'If you notice something (during the prayer), men should say Subhan Allah and women should clap."'

أَخْبَرَنَا أَحْمَدُ بْنُ عَبْدَةَ، عَنْ حَمَّادِ بْنِ زَيْدٍ، ثُمَّ ذَكَرَ كَلِمَةً مَعْنَاهَا قَالَ حَدَّثَنَا أَبُو حَازِمٍ، قَالَ سَهْلُ بْنُ سَعْدٍ كَانَ قِتَالٌ بَيْنَ بَنِي عَمْرِو بْنِ عَوْفٍ فَبَلَغَ ذَلِكَ النَّبِيَّ ﷺ فَصَلَّى الظُّهْرَ ثُمَّ أَتَاهُمْ لِيُصْلِحَ بَيْنَهُمْ ثُمَّ قَالَ لِبِلاَلٍ " يَا بِلاَلُ إِذَا حَضَرَ الْعَصْرُ وَلَمْ آتِ فَمُرْ أَبَا بَكْرٍ فَلْيُصَلِّ بِالنَّاسِ " . فَلَمَّا حَضَرَتْ أَذَّنَ بِلاَلٌ ثُمَّ أَقَامَ فَقَالَ لأَبِي بَكْرٍ رضى الله عنه تَقَدَّمْ . فَتَقَدَّمَ أَبُو بَكْرٍ فَدَخَلَ فِي الصَّلاَةِ ثُمَّ جَاءَ رَسُولُ اللَّهِ ﷺ فَجَعَلَ يَشُقُّ النَّاسَ حَتَّى قَامَ خَلْفَ أَبِي بَكْرٍ وَصَفَّحَ الْقَوْمُ وَكَانَ أَبُو بَكْرٍ إِذَا دَخَلَ فِي الصَّلاَةِ لَمْ يَلْتَفِتْ فَلَمَّا رَأَى أَبُو بَكْرٍ التَّصْفِيحَ لاَ يُمْسَكُ عَنْهُ الْتَفَتَ فَأَوْمَأَ إِلَيْهِ رَسُولُ اللَّهِ ﷺ بِيَدِهِ فَحَمِدَ اللَّهَ عَزَّ وَجَلَّ عَلَى قَوْلِ رَسُولِ اللَّهِ ﷺ لَهُ امْضِهْ ثُمَّ مَشَى أَبُو بَكْرٍ الْقَهْقَرَى عَلَى عَقِبَيْهِ فَتَأَخَّرَ فَلَمَّا رَأَى ذَلِكَ رَسُولُ اللَّهِ ﷺ تَقَدَّمَ فَصَلَّى بِالنَّاسِ فَلَمَّا قَضَى صَلاَتَهُ قَالَ " يَا أَبَا بَكْرٍ مَا مَنَعَكَ إِذْ أَوْمَأْتُ إِلَيْكَ أَنْ لاَ تَكُونَ مَضَيْتَ " . فَقَالَ لَمْ يَكُنْ لاِبْنِ أَبِي قُحَافَةَ أَنْ يَؤُمَّ رَسُولَ اللَّهِ ﷺ . وَقَالَ لِلنَّاسِ " إِذَا نَابَكُمْ شَىْءٌ فَلْيُسَبِّحِ الرِّجَالُ وَلْيُصَفِّحِ النِّسَاءُ " .