Abu Huraira told that at a certain time one day he went out with God's messenger who, when he came to Fatima's tent, said, "Is a little chap there? Is a little chap there?" meaning Hasan. In a moment he came running and when they had embraced one another God's messenger said, "O God, I love him, so I beseech Thee to love him and to love those who love him." (Bukhari and Muslim.)
Hadith Referenceمشكوة المصابيح / كتاب المناقب / 6143
Hadith Gradingالألبانی:مُتَّفَقٌ عَلَيْهِ | زبیر علی زئی:متفق عليه
Hadith Takhrij´تحقيق و تخريج: محدث العصر حافظ زبير على زئي رحمه الله` «متفق عليه، رواه البخاري (2122) و مسلم (57/ 2421)»