Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
nasai:1653 – Sulaymān b. Salm al-Balkhī > al-Naḍr > Yūnus > Abū Isḥāq > al-Aswad > Um Salamah

"The Messenger of Allah ﷺ did not pass away until most of his prayers were offered sitting down, except for the obligatory prayers."  

النسائي:١٦٥٣ – أَخْبَرَنَا سُلَيْمَانُ بْنُ سَلْمٍ الْبَلْخِيُّ قَالَ حَدَّثَنَا النَّضْرُ قَالَ أَنْبَأَنَا يُونُسُ عَنْ أَبِي إِسْحَاقَ عَنِ الأَسْوَدِ عَنْ أُمِّ سَلَمَةَ قَالَتْ

مَا قُبِضَ رَسُولُ اللَّهِ ﷺ حَتَّى كَانَ أَكْثَرُ صَلاَتِهِ جَالِسًا إِلاَّ الْمَكْتُوبَةَ خَالَفَهُ شُعْبَةُ وَسُفْيَانُ وَقَالاَ عَنْ أَبِي إِسْحَاقَ عَنْ أَبِي سَلَمَةَ عَنْ أُمِّ سَلَمَةَ  

See similar narrations below:

Collected by Nasāʾī's Kubrá
nasai-kubra:1362 – Sulaymān b. Salm > al-Naḍr > Yūnus > Abū Isḥāq > al-Aswad > Um Salamah

[Machine] The Messenger of Allah ﷺ did not perform most of his prayers while sitting, except for the obligatory ones. Shu'bah disagreed with this.  

الكبرى للنسائي:١٣٦٢ – أَخْبَرَنَا سُلَيْمَانُ بْنُ سَلْمٍ قَالَ حَدَّثَنَا النَّضْرُ قَالَ أَخْبَرَنَا يُونُسُ عَنْ أَبِي إِسْحَاقَ عَنِ الْأَسْوَدِ عَنْ أُمِّ سَلَمَةَ قَالَتْ

«مَا قُبِضَ رَسُولُ اللهِ ﷺ حَتَّى كَانَ أَكْثَرُ صَلَاتِهِ جَالِسًا إِلَّا الْمَكْتُوبَةَ» خَالَفَهُ شُعْبَةُ