"The Messenger of Allah ﷺ did not pass away until most of his prayers were offered sitting down, except for the obligatory prayers, and the dearest of actions to him were those which were done persistently, even if they were few." (Using translation from Nasāʾī 1654)
مَا مَاتَ رَسُولُ اللهِ ﷺ حَتَّى كَانَ «أَكْثَرُ صَلَاتِهِ قَاعِدًا إِلَّا الْفَرِيضَةَ وَكَانَ أَحَبُّ الْعَمَلِ إِلَيْهِ أَدْوَمُهُ وَإِنْ قَلَّ» خَالَفَهُ عُثْمَانُ بْنُ أَبِي سُلَيْمَانَ