"The Messenger of Allah (ﷺ) did not pass away until most of his prayers were offered sitting down, except for the obligatory prayers."
Sunan an-Nasa'i Book 20, Hadith 56
← Previous Hadith "The Messenger of Allah (ﷺ) did not refrain from (kissing) my forehead when he was fasting, and he did not die until most of his prayers were offered sitting down." Then she said something to the effect that (referred to the prayers) other than the obligatory prayers. "And the dearest of actions to him was that in which a person persists, even if it is little."

Sunan an-Nasa'i Book 20, Hadith 55 Next Hadith → "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."

Sunan an-Nasa'i Book 20, Hadith 57