The Prophet said to Hasan: "O Allah, I love him, so love him and love those who love him." He said: "And he hugged him to his chest."  

أَنَّ النَّبِيَّ ﷺ قَالَ لِلْحَسَنِ اللَّهُمَّ إِنِّي أُحِبُّهُ فَأَحِبَّهُ وَأَحِبَّ مَنْ يُحِبُّهُ قَالَ وَضَمَّهُ إِلَى صَدْرِهِ  

"The Messenger of Allah said: 'Whoever loves Hasan and Husain, loves me; and whoever hates them, hates me.'"  

قَالَ رَسُولُ اللَّهِ ﷺ مَنْ أَحَبَّ الْحَسَنَ وَالْحُسَيْنَ فَقَدْ أَحَبَّنِي وَمَنْ أَبْغَضَهُمَا فَقَدْ أَبْغَضَنِي  

They had gone out with the Prophet to a meal to which they had been invited, and Husain was there playing in the street. The Prophet came in front of the people and stretched out his hands, and the child started to run here and there. The Prophet made him laugh until he caught him, then he put one hand under his chin and the other on his head and kissed him, and said, "Husain is part of me and I am part of him. May Allah love those who love Husain. Husain is a tribe among tribes." (Hasan)(Another chain with similar meaning)  

أَنَّ يَعْلَى بْنَ مُرَّةَ حَدَّثَهُمْ أَنَّهُمْ خَرَجُوا مَعَ النَّبِيِّ ﷺ إِلَى طَعَامٍ دُعُوا لَهُ فَإِذَا حُسَيْنٌ يَلْعَبُ فِي السِّكَّةِ قَالَ فَتَقَدَّمَ النَّبِيُّ ﷺ أَمَامَ الْقَوْمِ وَبَسَطَ يَدَيْهِ فَجَعَلَ الْغُلاَمُ يَفِرُّ هَا هُنَا وَهَا هُنَا وَيُضَاحِكُهُ النَّبِيُّ ﷺ حَتَّى أَخَذَهُ فَجَعَلَ إِحْدَى يَدَيْهِ تَحْتَ ذَقَنِهِ وَالأُخْرَى فِي فَأْسِ رَأْسِهِ فَقَبَّلَهُ وَقَالَ حُسَيْنٌ مِنِّي وَأَنَا مِنْ حُسَيْنٍ أَحَبَّ اللَّهُ مَنْ أَحَبَّ حُسَيْنًا حُسَيْنٌ سِبْطٌ مِنَ الأَسْبَاطِ حَدَّثَنَا عَلِيُّ بْنُ مُحَمَّدٍ حَدَّثَنَا وَكِيعٌ عَنْ سُفْيَانَ مِثْلَهُ  

"The Messenger of Allah said to 'Ali, Fatimah, Hasan and Husain: 'I am peace for those with whom you make peace, and I am war for those with whom you make war.'"  

قَالَ رَسُولُ اللَّهِ ﷺ لِعَلِيٍّ وَفَاطِمَةَ وَالْحَسَنِ وَالْحُسَيْنِ أَنَا سِلْمٌ لِمَنْ سَالَمْتُمْ وَحَرْبٌ لِمَنْ حَارَبْتُمْ