What is done when one begins the prayer standing and mentioning the differences with those who reported from 'Aisha concerning it
أَخْبَرَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ، قَالَ أَنْبَأَنَا عِيسَى بْنُ يُونُسَ، قَالَ حَدَّثَنَا هِشَامُ بْنُ عُرْوَةَ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ، قَالَتْ مَا رَأَيْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم صَلَّى جَالِسًا حَتَّى دَخَلَ فِي السِّنِّ فَكَانَ يُصَلِّي وَهُوَ جَالِسٌ يَقْرَأُ فَإِذَا غَبَرَ مِنَ السُّورَةِ ثَلاَثُونَ أَوْ أَرْبَعُونَ آيَةً قَامَ فَقَرَأَ بِهَا ثُمَّ رَكَعَ .
It was narrated that Aishah said: "I never saw the Messenger of Allah (ﷺ) pray sitting down until he grew old. Then he would pray sitting down and when there were thirty or forty verses left, he would stand up and recite them, then bow."