'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  

[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] she said that the Messenger of Allah, ﷺ , used to pray the most when he felt burdened and physically tired while sitting.  

أَنَّهَا قَالَتْ كَانَ أَكْثَرُ صَلَاةِ رَسُولِ اللهِ ﷺ حِينَ ثَقُلَ وَبَدَّنَ وَهُوَ جَالِسٌ  

[Machine] The Messenger of Allah ﷺ used to pray much of his prayers while he was seated.  

كَانَ رَسُولُ اللهِ ﷺ يُصَلِّي كَثِيرًا مِنْ صَلَاتِهِ 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  

'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".  

"إِن رسُولَ اللهِ ﷺ لم يمت كَانَ أَكْثَر (*) صَلاتِهِ وَهُوَ جَالِسٌ".