Narrated Abu Huraira:

I was with Allah's Apostle in one of the Markets of Medina. He left (the market) and so did I. Then he asked thrice, "Where is the small (child)?" Then he said, "Call Al-Hasan bin 'Ali." So Al-Hasan bin 'Ali got up and started walking with a necklace (of beads) around his neck. The Prophet stretched his hand out like this, and Al-Hasan did the same. The Prophet embraced him and said, "0 Allah! l love him, so please love him and love those who love him." Since Allah's Apostle ﷺ said that. nothing has been dearer to me than Al-Hasan.

حَدَّثَنِي إِسْحَاقُ بْنُ إِبْرَاهِيمَ الْحَنْظَلِيُّ، أَخْبَرَنَا يَحْيَى بْنُ آدَمَ، حَدَّثَنَا وَرْقَاءُ بْنُ عُمَرَ، عَنْ عُبَيْدِ اللَّهِ بْنِ أَبِي يَزِيدَ، عَنْ نَافِعِ بْنِ جُبَيْرٍ، عَنْ أَبِي هُرَيْرَةَ ـ رضى الله عنه ـ قَالَ كُنْتُ مَعَ رَسُولِ اللَّهِ ﷺ فِي سُوقٍ مِنْ أَسْوَاقِ الْمَدِينَةِ فَانْصَرَفَ فَانْصَرَفْتُ فَقَالَ " أَيْنَ لُكَعُ ـ ثَلاَثًا ـ ادْعُ الْحَسَنَ بْنَ عَلِيٍّ ". فَقَامَ الْحَسَنُ بْنُ عَلِيٍّ يَمْشِي وَفِي عُنُقِهِ السِّخَابُ، فَقَالَ النَّبِيُّ ﷺ بِيَدِهِ هَكَذَا، فَقَالَ الْحَسَنُ بِيَدِهِ، هَكَذَا فَالْتَزَمَهُ فَقَالَ " اللَّهُمَّ إِنِّي أُحِبُّهُ، فَأَحِبَّهُ، وَأَحِبَّ مَنْ يُحِبُّهُ ". قَالَ أَبُو هُرَيْرَةَ فَمَا كَانَ أَحَدٌ أَحَبَّ إِلَىَّ مِنَ الْحَسَنِ بْنِ عَلِيٍّ بَعْدَ مَا قَالَ رَسُولُ اللَّهِ ﷺ مَا قَالَ.