Al-Adab Al-Mufrad, Book 12, Hadith 249 (English) ⓘ

Abu Hurayra said, "These two ears of mine have heard and these two eyes of mine have seen the Messenger of Allah, may Allah bless him and grant him peace, take the palms of al-Hasan - or al-Husayn - in both his hands. His feet were on the feet of the Messenger of Allah, may Allah bless him and grant him peace. The Messenger of Allah, may Allah bless him and grant him peace, said, 'Climb up.' The boy climbed until his feet reached the chest of the Messenger of Allah, may Allah bless him and grant him peace, and then the Messenger of Allah, may Allah bless him and grant him peace, said, 'Open your mouth.' Then he kissed him and said, 'O Allah, love him for I love him!'"

حَدَّثَنَا مُحَمَّدُ بْنُ عُبَيْدِ اللهِ، قَالَ‏:‏ حَدَّثَنَا حَاتِمٌ، عَنْ مُعَاوِيَةَ بْنِ أَبِي مُزَرِّدٍ، عَنْ أَبِيهِ قَالَ‏:‏ سَمِعْتُ أَبَا هُرَيْرَةَ يَقُولُ‏:‏ سَمِعَ أُذُنَايَ هَاتَانِ، وَبَصُرَ عَيْنَايَ هَاتَانِ رَسُولَ اللهِ صلى الله عليه وسلم أَخَذَ بِيَدَيْهِ جَمِيعًا بِكَفَّيِّ الْحَسَنِ، أَوِ الْحُسَيْنِ صَلَوَاتُ اللهِ عَلَيْهِمَا وَقَدَمَيهِ عَلَى قَدَمِ رَسُولِ اللهِ صلى الله عليه وسلم، وَرَسُولُ اللهِ صلى الله عليه وسلم يَقُولُ‏:‏ ارْقَهْ، قَالَ‏:‏ فَرَقِيَ الْغُلاَمُ حَتَّى وَضَعَ قَدَمَيْهِ عَلَى صَدْرِ رَسُولِ اللهِ صلى الله عليه وسلم، ثُمَّ قَالَ رَسُولُ اللهِ صلى الله عليه وسلم‏:‏ افْتَحْ فَاكَ، ثُمَّ قَبَّلَهُ، ثُمَّ قَالَ‏:‏ اللَّهُمَّ أَحِبَّهُ، فَإِنِّي أُحِبُّهُ‏.‏