Sahih Muslim 906 c
Asma' daughter of Abu Bakr reported:
The sun eclipsed during the lifetime of the Messenger of Allah (ﷺ) ; so he felt perturbed and he, by mistake, took hold of the outer garment of a woman till he was given his own cloak. After this I satisfied my need and then came and entered the mosque. I saw the Messenger of Allah (ﷺ) standing in prayer. I stood along with him. He prolonged his qiyam till I wished to sit down. Then I cast a glance towards an old woman. So I said: She is older than I. I, therefore, kept standing. He (the Holy Prophet) then observed ruku', and prolonged his ruku'. He then raised his head. He then prolonged his qiyam to such an extent that if a person happened to come he would have thought that he had not observed the ruku'.
وَحَدَّثَنِي أَحْمَدُ بْنُ سَعِيدٍ الدَّارِمِيُّ، حَدَّثَنَا حَبَّانُ، حَدَّثَنَا وُهَيْبٌ، حَدَّثَنَا مَنْصُورٌ، عَنْ أُمِّهِ، عَنْ أَسْمَاءَ بِنْتِ أَبِي بَكْرٍ، قَالَتْ كَسَفَتِ الشَّمْسُ عَلَى عَهْدِ النَّبِيِّ صلى الله عليه وسلم فَفَزِعَ فَأَخْطَأَ بِدِرْعٍ حَتَّى أُدْرِكَ بِرِدَائِهِ بَعْدَ ذَلِكَ قَالَتْ فَقَضَيْتُ حَاجَتِي ثُمَّ جِئْتُ وَدَخَلْتُ الْمَسْجِدَ فَرَأَيْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم قَائِمًا فَقُمْتُ مَعَهُ فَأَطَالَ الْقِيَامَ حَتَّى رَأَيْتُنِي أُرِيدُ أَنْ أَجْلِسَ ثُمَّ أَلْتَفِتُ إِلَى الْمَرْأَةِ الضَّعِيفَةِ فَأَقُولُ هَذِهِ أَضْعَفُ مِنِّي ‏.‏ فَأَقُومُ فَرَكَعَ فَأَطَالَ الرُّكُوعَ ثُمَّ رَفَعَ رَأْسَهُ فَأَطَالَ الْقِيَامَ حَتَّى لَوْ أَنَّ رَجُلاً جَاءَ خُيِّلَ إِلَيْهِ أَنَّهُ لَمْ يَرْكَعْ ‏.‏