By Allah, Al-Hasan bin ʿAli led large battalions like mountains against Muawiya. ʿAmr bin Al-As said (to Muawiya), "I surely see battalions which will not turn back before killing their opponents." Muawiya who was really the best of the two men said to him, "O ʿAmr! If these killed those and those killed these, who would be left with me for the jobs of the public, who would be left with me for their women, who would be left with me for their children?" Then Muawiya sent two Quraishi men from the tribe of ʿAbd-i-Shams called ʿAbdur Rahman bin Sumura and ʿAbdullah bin 'Amir bin Kuraiz to Al-Hasan saying to them, "Go to this man (i.e. Al-Hasan) and negotiate peace with him and talk and appeal to him." So, they went to Al-Hasan and talked and appealed to him to accept peace. Al-Hasan said, "We, the offspring of ʿAbdul Muttalib, have got wealth and people have indulged in killing and corruption (and money only will appease them)." They said to Al-Hasan, "Muawiya offers you so and so, and appeals to you and entreats you to accept peace." Al-Hasan said to them, "But who will be responsible for what you have said?" They said, "We will be responsible for it." So, whatever Al- Hasan asked they said, "We will be responsible for it for you." So, Al-Hasan concluded a peace treaty with Muawiya. Al-Hasan (Al-Basri) said: I heard Abu Bakr saying, "I saw Messenger of Allah ﷺ on the pulpit and Al-Hasan bin ʿAli was by his side. The Prophet ﷺ was looking once at the people and once at Al-Hasan bin ʿAli saying, 'This son of mine is a Saiyid (i.e. a noble) and may Allah make peace between two big groups of Muslims through him."  

اذْهَبَا إِلَى هَذَا الرَّجُلِ فَاعْرِضَا عَلَيْهِ وَقُولاَ لَهُ وَاطْلُبَا إِلَيْهِ فَأَتَيَاهُ فَدَخَلاَ عَلَيْهِ فَتَكَلَّمَا وَقَالاَ لَهُ فَطَلَبَا إِلَيْهِ فَقَالَ لَهُمَا الْحَسَنُ بْنُ عَلِيٍّ إِنَّا بَنُو عَبْدِ الْمُطَّلِبِ قَدْ أَصَبْنَا مِنْ هَذَا الْمَالِ وَإِنَّ هَذِهِ الأُمَّةَ قَدْ عَاثَتْ فِي دِمَائِهَا قَالاَ فَإِنَّهُ يَعْرِضُ عَلَيْكَ كَذَا وَكَذَا وَيَطْلُبُ إِلَيْكَ وَيَسْأَلُكَ قَالَ فَمَنْ لِي بِهَذَا قَالاَ نَحْنُ لَكَ بِهِ فَمَا سَأَلَهُمَا شَيْئًا إِلاَّ قَالاَ نَحْنُ لَكَ بِهِ فَصَالَحَهُ فَقَالَ الْحَسَنُ وَلَقَدْ سَمِعْتُ أَبَا بَكْرَةَ يَقُولُ رَأَيْتُ رَسُولَ اللَّهِ ﷺ عَلَى الْمِنْبَرِ وَالْحَسَنُ بْنُ عَلِيٍّ إِلَى جَنْبِهِ وَهْوَ يُقْبِلُ عَلَى النَّاسِ مَرَّةً وَعَلَيْهِ أُخْرَى وَيَقُولُ إِنَّ ابْنِي هَذَا سَيِّدٌ وَلَعَلَّ اللَّهَ أَنْ يُصْلِحَ بِهِ بَيْنَ فِئَتَيْنِ عَظِيمَتَيْنِ مِنَ الْمُسْلِمِينَ قَالَ لِي عَلِيُّ بْنُ عَبْدِ اللَّهِ إِنَّمَا ثَبَتَ لَنَا سَمَاعُ الْحَسَنِ مِنْ أَبِي بَكْرَةَ بِهَذَا الْحَدِيثِ