Umm Salama bint Abu Umaya reported,

By the One in whose hand my soul is, the Messenger of Allah ﷺ did not die until most of his prayers were performed sitting, except for the obligatory ones. The deeds he loved most were those performed consistently, even if they were few.Uthman bin Abu Sulayman differed from him and narrated it from Abu Salama from Ayesha.

Nasai 1656

Sahih

أخبرنا عبد الله بن عبد الصمد قال حدثنا يزيد قال حدثنا سفيان عن أبي إسحق عن أبي سلمة

عن أم سلمة قالت

والذي نفسي بيده ما مات رسول الله ﷺ حتى كان أكثر صلاته قاعدا إلا المكتوبة وكان أحب العمل إليه ما داوم عليه وإن قل خالفه عثمان بن أبي سليمان فرواه عن أبي سلمة عن عائشة

النسائي 1656صحيح
Contents
Reference
Commentary
Ayat
Collection
Sunan Nasai Sughra
Book
Night prayer and voluntary prayers of the day
Chapter
Prayer of the one sitting in voluntary prayer and mention of the difference of opinion regarding Abu Ishaq in that
Numbering
Darussalam 1656
Nasai 1656