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

أَنَّ النَّبِيَّ ﷺ لَمْ يَمُتْ حَتَّى كَانَ كَثِيرٌ مِنْ صَلاَتِهِ وَهُوَ جَالِسٌ

When the Messenger of Allah ﷺ grew bulky and heavy he would observe (most of his Nafl) prayers sitting.

لَمَّا بَدَّنَ رَسُولُ اللَّهِ ﷺ وَثَقُلَ كَانَ أَكْثَرُ صَلاَتِهِ جَالِسًا

"The Prophet ﷺ did not die until most of his prayers were offered sitting down."

أَنَّ النَّبِيَّ ﷺ لَمْ يَمُتْ حَتَّى كَانَ يُصَلِّي كَثِيرًا مِنْ صَلاَتِهِ وَهُوَ جَالِسٌ

"The Prophet ﷺ did not die until most of his prayers were offered sitting down." (Using translation from Nasāʾī 1656)

أَنَّ النَّبِيَّ ﷺ لَمْ يَمُتْ حَتَّى كَانَ يُصَلِّي كَثِيرًا مِنْ صَلَاتِهِ وَهُوَ جَالِسٌ

[Machine] The Messenger of Allah, ﷺ , did not pass away until most of his prayers were performed while sitting down.

مَا قُبِضَ رَسُولُ اللهِ ﷺ حَتَّى كَانَ أَكْثَرَ صَلَاتِهِ جَالِسًا

[Machine] "That the Messenger of Allah ﷺ did not die until his most frequent prayer was performed sitting."

«أَنَّ رَسُولَ اللَّهِ ﷺ لَمْ يَمُتْ حَتَّى كَانَ أَكْثَرَ صَلَاتِهِ جَالِسًا»

'A'isha reported that the Messenger of Allah ﷺ died (in this very state) that he observed most of his (Nafl) prayers in a sitting position. (Using translation from Muslim 732c)

أَنَّ رَسُولَ اللهِ ﷺ لَمْ يَمُتْ حَتَّى كَانَ «كَثِيرٌ مِنْ صَلَاتِهِ وَهُوَ جَالِسٌ»

"والذي نفسي بيده ما مات حتى كان أكثر صلاته وهو جالس".