أَخْبَرَنَا مُحَمَّدُ بْنُ عَبْدِ اللَّهِ بْنِ بَزِيعٍ، قَالَ حَدَّثَنَا عَبْدُ الأَعْلَى بْنُ عَبْدِ الأَعْلَى، قَالَ حَدَّثَنَا عُبَيْدُ اللَّهِ، - وَهُوَ ابْنُ عُمَرَ - عَنْ أَبِي حَازِمٍ، عَنْ سَهْلِ بْنِ سَعْدٍ، قَالَ انْطَلَقَ رَسُولُ اللَّهِ صلى الله عليه وسلم يُصْلِحُ بَيْنَ بَنِي عَمْرِو بْنِ عَوْفٍ فَحَضَرَتِ الصَّلاَةُ فَجَاءَ الْمُؤَذِّنُ إِلَى أَبِي بَكْرٍ فَأَمَرَهُ أَنْ يَجْمَعَ النَّاسَ وَيَؤُمَّهُمْ فَجَاءَ رَسُولُ اللَّهِ صلى الله عليه وسلم فَخَرَقَ الصُّفُوفَ حَتَّى قَامَ فِي الصَّفِّ الْمُقَدَّمِ وَصَفَّحَ النَّاسُ بِأَبِي بَكْرٍ لِيُؤْذِنُوهُ بِرَسُولِ اللَّهِ صلى الله عليه وسلم وَكَانَ أَبُو بَكْرٍ لاَ يَلْتَفِتُ فِي الصَّلاَةِ فَلَمَّا أَكْثَرُوا عَلِمَ أَنَّهُ قَدْ نَابَهُمْ شَىْءٌ فِي صَلاَتِهِمْ فَالْتَفَتَ فَإِذَا هُوَ بِرَسُولِ اللَّهِ صلى الله عليه وسلم فَأَوْمَأَ إِلَيْهِ رَسُولُ اللَّهِ صلى الله عليه وسلم أَىْ كَمَا أَنْتَ فَرَفَعَ أَبُو بَكْرٍ يَدَيْهِ فَحَمِدَ اللَّهَ وَأَثْنَى عَلَيْهِ لِقَوْلِ رَسُولِ اللَّهِ صلى الله عليه وسلم ثُمَّ رَجَعَ الْقَهْقَرَى وَتَقَدَّمَ رَسُولُ اللَّهِ صلى الله عليه وسلم فَصَلَّى فَلَمَّا انْصَرَفَ قَالَ لأَبِي بَكْرٍ ‏"‏ مَا مَنَعَكَ إِذْ أَوْمَأْتُ إِلَيْكَ أَنْ تُصَلِّيَ ‏"‏ ‏.‏ فَقَالَ أَبُو بَكْرٍ رضى الله عنه مَا كَانَ يَنْبَغِي لاِبْنِ أَبِي قُحَافَةَ أَنْ يَؤُمَّ رَسُولَ اللَّهِ صلى الله عليه وسلم ‏.‏ ثُمَّ قَالَ لِلنَّاسِ ‏"‏ مَا بَالُكُمْ صَفَّحْتُمْ إِنَّمَا التَّصْفِيحُ لِلنِّسَاءِ ‏"‏ ‏.‏ ثُمَّ قَالَ ‏"‏ إِذَا نَابَكُمْ شَىْءٌ فِي صَلاَتِكُمْ فَسَبِّحُوا ‏"‏ ‏.‏

It was narrated that Sahl bin Sa'd said: "The Messenger of Allah (PBUH) set out to bring about reconciliation among Banu 'Amr bin 'Awf. The time for prayer came, and the Mu'adhdhin went to Abu Bakr to tell him to gather the people and lead them in prayer. Then the Messenger of Allah (PBUH) came and passed though the rows until he stood in the first row. The people started clapping to let Abu Bakr know that the Messenger of Allah (PBUH) had come. Abu Bakr never used to turn around when he prayed, but when they clapped consistently he realized something must have happened while they were praying. So he turned around and saw the Messenger of Allah (PBUH). The Messenger of Allah (PBUH) gestured to him to stay where he was. Abu Bakr raised his hands and praised and thanked Allah (SWT) for what the Messenger of Allah (PBUH) had said. Then, he moved backwards, and the Messenger of Allah (PBUH) went forward and prayed. When he finished, he said to Abu Bakr: 'What stopped you from continuing to pray when I gestured to you?' Abu Bakr, may Allah (SWT) be pleased with him, said: 'It was not appropriate for the son of Abu Quhafah to lead the Messenger of Allah (PBUH) in prayer.' Then he said to the people: 'Why did you clap?' Clapping is for women.' Then he said: 'If you notice something when you are praying, say "SubhanAllah.'" Translation Not Available

Book reference: Sunan An Nisai Book 13 Hadith 1183
Web reference: Sunan An Nisai Volume 2 Book 13 Hadith 1184