Jami` at-Tirmidhi, Volume 6, Book 46, Hadith 3773 (DarusSalam) ⓘ
Narrated Abu Bakrah: that the Messenger of Allah ascended the Minbar and said: "Indeed, this son of mine is a chief, Allah shall bring peace between two [tremendous] parties through his hands."
حَدَّثَنَا مُحَمَّدُ بْنُ بَشَّارٍ، حَدَّثَنَا الأَنْصَارِيُّ، مُحَمَّدُ بْنُ عَبْدِ اللَّهِ حَدَّثَنَا الأَشْعَثُ، هُوَ ابْنُ عَبْدِ الْمَلِكِ عَنِ الْحَسَنِ، عَنْ أَبِي بَكْرَةَ، قَالَ صَعِدَ رَسُولُ اللَّهِ صلى الله عليه وسلم الْمِنْبَرَ فَقَالَ " إِنَّ ابْنِي هَذَا سَيِّدٌ يُصْلِحُ اللَّهُ عَلَى يَدَيْهِ فِئَتَيْنِ عَظِيمَتَيْنِ " . قَالَ هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ . يَعْنِي الْحَسَنَ بْنَ عَلِيٍّ .
also referenced under: Hadith 3773 (Reference) & Book 49, Hadith 4142 (In-Book)