To raise the hands in Salat because of necessity

Narrated Sahl bin Sad:

The news about the differences amongst the people of Bani 'Amr bin 'Auf at Quba reached Allah's Apostle and so he went to them along with some of his companions to affect a reconciliation. Allah's Apostle was delayed there and the time for the prayer became due. Bilal came to Abu Bakr! and said, "O Abu Bakr! Allah's Apostle is detained (there) and the time for the prayer is due. Will you lead the people in prayer?" Abu Bakr replied, "Yes, if you wish." So Bilal pronounced the Iqama and Abu Bakr went forward and the people said Takbir. In the meantime, Allah's Apostle came piercing through the rows till he stood in the (first) row and the people started clapping. Abu Bakr, would never look hither and thither during the prayer but when the people clapped much he looked back and saw Allah's Apostle. The Prophet beckoned him to carry on. Abu Bakr raised both his hands, praised Allah and retreated till he stood in the row and Allah's Apostle went forward and led the people in the prayer. When he had finished the prayer, he addressed the people and said, "O people! Why did you start clapping when something happened to you in the prayer? Clapping is for women. Whenever one is confronted with something unusual in the prayer one should say, 'Sub Han Allah'." Then the Prophet looked towards Abu Bakr and asked, "What prevented you from leading the prayer when I beckoned you to carry on?" Abu Bakr replied, "It does not befit the son of Al Quhafa to lead the prayer in the presence of Allah's Apostle

حَدَّثَنَا قُتَيْبَةُ، حَدَّثَنَا عَبْدُ الْعَزِيزِ، عَنْ أَبِي حَازِمٍ، عَنْ سَهْلِ بْنِ سَعْدٍ ـ رضى الله عنه ـ قَالَ بَلَغَ رَسُولَ اللَّهِ ﷺ أَنَّ بَنِي عَمْرِو بْنِ عَوْفٍ بِقُبَاءٍ كَانَ بَيْنَهُمْ شَىْءٌ، فَخَرَجَ يُصْلِحُ بَيْنَهُمْ فِي أُنَاسٍ مِنْ أَصْحَابِهِ، فَحُبِسَ رَسُولُ اللَّهِ ﷺ وَحَانَتِ الصَّلاَةُ، فَجَاءَ بِلاَلٌ إِلَى أَبِي بَكْرٍ ـ رضى الله عنهما ـ فَقَالَ يَا أَبَا بَكْرٍ، إِنَّ رَسُولَ اللَّهِ ﷺ قَدْ حُبِسَ وَقَدْ حَانَتِ الصَّلاَةُ، فَهَلْ لَكَ أَنْ تَؤُمَّ النَّاسَ قَالَ نَعَمْ إِنْ شِئْتَ. فَأَقَامَ بِلاَلٌ الصَّلاَةَ، وَتَقَدَّمَ أَبُو بَكْرٍ ـ رضى الله عنه ـ فَكَبَّرَ لِلنَّاسِ، وَجَاءَ رَسُولُ اللَّهِ ﷺ يَمْشِي فِي الصُّفُوفِ يَشُقُّهَا شَقًّا، حَتَّى قَامَ فِي الصَّفِّ، فَأَخَذَ النَّاسُ فِي التَّصْفِيحِ. قَالَ سَهْلٌ التَّصْفِيحُ هُوَ التَّصْفِيقُ. قَالَ وَكَانَ أَبُو بَكْرٍ ـ رضى الله عنه ـ لاَ يَلْتَفِتُ فِي صَلاَتِهِ، فَلَمَّا أَكْثَرَ النَّاسُ الْتَفَتَ فَإِذَا رَسُولُ اللَّهِ ﷺ فَأَشَارَ إِلَيْهِ، يَأْمُرُهُ أَنْ يُصَلِّيَ، فَرَفَعَ أَبُو بَكْرٍ ـ رضى الله عنه ـ يَدَهُ، فَحَمِدَ اللَّهَ، ثُمَّ رَجَعَ الْقَهْقَرَى وَرَاءَهُ حَتَّى قَامَ فِي الصَّفِّ، وَتَقَدَّمَ رَسُولُ اللَّهِ ﷺ فَصَلَّى لِلنَّاسِ، فَلَمَّا فَرَغَ أَقْبَلَ عَلَى النَّاسِ فَقَالَ " يَا أَيُّهَا النَّاسُ مَا لَكُمْ حِينَ نَابَكُمْ شَىْءٌ فِي الصَّلاَةِ أَخَذْتُمْ بِالتَّصْفِيحِ إِنَّمَا التَّصْفِيحُ لِلنِّسَاءِ، مَنْ نَابَهُ شَىْءٌ فِي صَلاَتِهِ فَلْيَقُلْ سُبْحَانَ اللَّهِ ". ثُمَّ الْتَفَتَ إِلَى أَبِي بَكْرٍ ـ رضى الله عنه ـ فَقَالَ " يَا أَبَا بَكْرٍ، مَا مَنَعَكَ أَنْ تُصَلِّيَ لِلنَّاسِ حِينَ أَشَرْتُ إِلَيْكَ ". قَالَ أَبُو بَكْرٍ مَا كَانَ يَنْبَغِي لاِبْنِ أَبِي قُحَافَةَ أَنْ يُصَلِّيَ بَيْنَ يَدَىْ رَسُولِ اللَّهِ ﷺ.