[Machine] The Prophet Muhammad ﷺ used to perform Witr prayer with seven (units) until he gained weight or his flesh increased, then he would perform Witr prayer with three (units) and would also perform two additional units while sitting, reciting in them the verse "Say, O disbelievers." Abu Sa'ad Al-Maalini narrated to us, Abu Ahmad bin 'Adi informed us, Ahmad bin Ali bin Al-Muthanna informed us, Abdul Wahid bin Ghayath informed us, Umamah bin Zathan narrated to me, and Abu Galib mentioned it. Al-Bukhari (may Allah have mercy upon him) used to say that Umamah bin Zathan would sometimes have some confusion in his narration.  

أَنَّ رَسُولَ اللهِ ﷺ كَانَ يُوتِرُ بِسَبْعٍ حَتَّى إِذَا بَدَّنَ وَكَثُرَ لَحْمُهُ أَوْتَرَ بِثَلَاثٍ وَصَلَّى رَكْعَتَيْنِ وَهُوَ جَالِسٌ يَقْرَأُ فِيهِمَا إِذَا زُلْزِلَتْ وَقُلْ يَا أَيُّهَا الْكَافِرُونَ أَخْبَرَنَاهُ أَبُو سَعْدٍ الْمَالِينِيُّ أنبأ أَبُو أَحْمَدَ بْنُ عَدِيٍّ ثنا أَحْمَدُ بْنُ عَلِيِّ بْنِ الْمُثَنَّى ثنا عَبْدُ الْوَاحِدِ بْنُ غِيَاثٍ ثنا عُمَارَةُ بْنُ زَاذَانَ حَدَّثَنِي أَبُو غَالِبٍ فَذَكَرَهُ وَكَانَ الْبُخَارِيُّ رَحِمَهُ اللهُ يَقُولُ عُمَارَةُ بْنُ زَاذَانَ رُبَّمَا يَضْطَرِبُ فِي حَدِيثِهِ