Sahih Muslim 1707

Abdullah b. Shaqiq reported: I asked 'A'isha whether the Messenger of Allah ( ‌صلی ‌اللہ ‌علیہ ‌وسلم ‌ ) observed (Nafl) sitting. She said: Yes, when the people had made him old. ..

Abdullah b. Shaqiq reported: I said to 'A'isha and she made a mention of that (recorded above) about the Messenger of Allah ( ‌صلی ‌اللہ ‌علیہ ‌وسلم ‌ ). ..

A'isha reported that the Messenger of Allah ( ‌صلی ‌اللہ ‌علیہ ‌وسلم ‌ ) died (in this very state) that he observed most of his (Nafl) prayers in a sitting position. ..

A'isha reported: When the Messenger of Allah ( ‌صلی ‌اللہ ‌علیہ ‌وسلم ‌ ) grew bulky and heavy he would observe (most of his Nafl) prayers sitting. ..

Hafsa reported: Never did I see the Messenger of Allah ( ‌صلی ‌اللہ ‌علیہ ‌وسلم ‌ ) observing supererogatory prayer sitting till one year before his death when he would observe Nafl prayer in a sitting position, and he would recite the Surah (of..

Zuhri reported this hadith with the same chain of transmitters, except this that he made a mention of one year or two years. ..