that she said, "I never saw the Messenger of Allāh ﷺ pray his supererogatory prayers while sitting; until a year before his passing when he would his supererogatory prayers while sitting and reciting the sūrah in ˹such a slow˺ measured manner that it became longer than his ˹usual˺ longer ones." (Using translation from Aḥmad 26441)
مَا رَأَيْتُ رَسُولَ اللهِ ﷺ يُصَلِّي فِي سُبْحَتِهِ جَالِسًا قَطُّ حَتَّى كَانَ قَبْلَ مَوْتِهِ بِعَامٍ فَكَانَ يُصَلِّي جَالِسًا فَيَقْرَأُ السُّورَةَ فَيُرَتِّلُهَا حَتَّى تَكُونَ أَطْوَلَ مِنْ أَطْوَلَ مِنْهَا