When Al-Hasan bin ʿAli moved with army units against Muawiya, ʿAmr bin AL-As said to Muawiya, "I see an army that will not retreat unless and until the opposing army retreats." Muawiya said, "(If the Muslims are killed) who will look after their children?" ʿAmr bin Al-As said: I (will look after them). On that, ʿAbdullah bin 'Amir and ʿAbdur-Rahman bin Samura said, "Let us meet Muawaiya and suggest peace." Al-Hasan Al-Basri added: No doubt, I heard that Abu Bakra said, "Once while the Prophet was addressing (the people), Al-Hasan (bin ʿAli) came and the Prophet ﷺ said, 'This son of mine is a chief, and Allah may make peace between two groups of Muslims through him."  

بَيْنَا النَّبِيُّ ﷺ يَخْطُبُ جَاءَ الْحَسَنُ فَقَالَ النَّبِيُّ ﷺ ابْنِي هَذَا سَيِّدٌ وَلَعَلَّ اللَّهَ أَنْ يُصْلِحَ بِهِ بَيْنَ فِئَتَيْنِ مِنَ الْمُسْلِمِينَ  

The Messenger of Allah ﷺ said to al-Hasan ibn Ali. This son of mine is a Sayyid (chief), and I hope Allah may reconcile two parties of my community by means of him. Hammad's version has: And perhaps Allah may reconcile two large parties of Muslims by means of him. (Using translation from Abū Dāʾūd 4662)   

قَالَ رَسُولُ اللَّهِ ﷺ لِلْحَسَنِ بْنِ عَلِيٍّ «إِنَّ ابْنِي هَذَا سَيِّدٌ وَلَعَلَّ اللَّهَ أَنْ يُصْلِحَ بِهِ بَيْنَ فِئَتَيْنِ مِنَ الْمُسْلِمِينَ عَظِيمَتَيْنِ»  

"إِنَّ ابْنِى هَذَا سيِّدٌ، ولَعَلَّ اللَّهَ أنْ يُصْلِحَ به بَيْنَ فئَتَيْنِ عَظيمَتَيْن مِنَ المُسْلمِينَ ".  

"إِنَّ ابْنى هَذَا سَيِّدٌ وإنَّ اللَّهَ سَيُصْلِح عَلَى يَدَيْه بَيْنَ فئَتَيْنِ من المُسْلِمِينَ عَظيَمتَيْنِ ".  

"عَنِ الحَسَنِ قَالَ: رَفَعَ رَسُولُ اللَّهِ ﷺ الْحَسَنَ بْنَ عَلَىٍّ مَعَهُ عَلَى الْمِنْبرِ، فَقَالَ: إن ابْنِى هَذَا سَيِّدٌ وَلَعَلَّ اللَّهَ -تَعَالَى- أَنْ يُصْلِحَ بِهِ بَيْنَ فِئَتَيْنِ مِنَ الْمُسْلِمِينَ".