Mishkat al-Masabih 30 Fine Qualities كتاب المناقب 159

وَعَن أبي بكرَة قَالَ: رَأَيْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ عَلَى الْمِنْبَرِ وَالْحَسَنُ بْنُ عَلِيٍّ إِلَى جَنْبِهِ وَهُوَ يُقْبِلُ عَلَى النَّاسِ مَرَّةً وَعَلَيْهِ أُخْرَى وَيَقُولُ: «إِنَّ ابْنِي هَذَا سَيِّدٌ وَلَعَلَّ اللَّهَ أَنْ يُصْلِحَ بِهِ بَيْنَ فِئَتَيْنِ عَظِيمَتَيْنِ مِنَ الْمُسْلِمِينَ» . رَوَاهُ البُخَارِيّ

Abu Bakra told that he saw God’s messenger on the pulpit with al-Hasan b. `Ali at his side. He was looking towards the people at one moment and towards him at another and saying, “This son of mine is a sayyid , and perhaps God m ay reconcile two large parties of Muslims by means of him.” Bukhari transmitted it.