Sunan Abi Dawud 1093
سنن أبي داود#1093Sahihحَدَّثَنَا النُّفَيْلِيُّ عَبْدُ اللَّهِ بْنُ مُحَمَّدٍ، حَدَّثَنَا زُهَيْرٌ، عَنْ سِمَاكٍ، عَنْ جَابِرِ بْنِ سَمُرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم كَانَ يَخْطُبُ قَائِمًا ثُمَّ يَجْلِسُ ثُمَّ يَقُومُ فَيَخْطُبُ قَائِمًا فَمَنْ حَدَّثَكَ أَنَّهُ كَانَ يَخْطُبُ جَالِسًا فَقَدْ كَذَبَ فَقَالَ فَقَدْ وَاللَّهِ صَلَّيْتُ مَعَهُ أَكْثَرَ مِنْ أَلْفَىْ صَلاَةٍ .
Jabir b. Samurah said:The Messenger of Allah (ﷺ) used to deliver the sermon standing, then he would sit down, then stand and preach standing. If anyone tells you he preached sitting, he is lying. I swear by Allah that I offered along with more than two thousand prayers
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
In-book reference: 2:704