[Machine] The Prophet ﷺ used to pray two rak'ahs after Witr while sitting, and this is the view of Al-Basri, and there is no problem with it except that he used to perform tasleem. Ahmad ibn Hanbal and others said this, and Allah knows best. It was narrated from Zakariya ibn Hakim from Al-Hasan, and Hisham differed from them. They narrated it from Al-Hasan and from Sa'ad ibn Hisham from Aisha. Al-Bukhari said: "And this is the most authentic."  

كَانَ رَسُولُ اللهِ ﷺ يُصَلِّي بَعْدَ الْوِتْرِ رَكْعَتَيْنِ وَهُوَ جَالِسٌ مَيْمُونٌ هَذَا بَصْرِيٌّ وَلَا بَأْسَ بِهِ إِلَّا أَنَّهُ كَانَ يُدَلِّسُ قَالَهُ أَحْمَدُ بْنُ حَنْبَلٍ وَغَيْرُهُ وَاللهُ أَعْلَمُ وَرُوِيَ عَنْ زَكَرِيَّا بْنِ حَكِيمٍ عَنِ الْحَسَنِ وَخَالَفَهُمَا هِشَامٌ فَرَوَاهُ عَنِ الْحَسَنِ عَنْ سَعْدِ بْنِ هِشَامٍ عَنْ عَائِشَةَ قَالَ الْبُخَارِيُّ وَهَذَا أَصَحُّ