حَدَّثَنَا عَبْدَةُ بْنُ عَبْدِ اللَّهِ، أَخْبَرَنَا زَيْدٌ، - يَعْنِي ابْنَ الْحُبَابِ - عَنْ مُحَمَّدِ بْنِ صَالِحٍ، حَدَّثَنِي حُصَيْنٌ، مِنْ وَلَدِ سَعْدِ بْنِ مُعَاذٍ عَنْ أُسَيْدِ بْنِ حُضَيْرٍ، أَنَّهُ كَانَ يَؤُمُّهُمْ - قَالَ - فَجَاءَ رَسُولُ اللَّهِ صلى الله عليه وسلم يَعُودُهُ فَقَالُوا يَا رَسُولَ اللَّهِ إِنَّ إِمَامَنَا مَرِيضٌ ‏.‏ فَقَالَ ‏"‏إِذَا صَلَّى قَاعِدًا فَصَلُّوا قُعُودًا ‏"‏ ‏.‏ قَالَ أَبُو دَاوُدَ هذا الْحَدِيثُ لَيْسَ بِمُتَّصِلٍ
Translation
Husain reported on the authority of the children of Sa’d b. Mu’adh that Usaid b. Hudair used to act as their Imam. (when he fell ill) the Messenger of Allah (ﷺ) came to him inquiring about his illness. They said

That he used to lead them in prayer - he said - and the Messenger of Allah (ﷺ) came visiting him. They said, "O Messenger of Allah, indeed our imam is sick." So he said, "When he prays sitting, then pray sitting." Abu Dawud said: This hadith is not continuous (muttasil).