Sayyiduna Usamah bin Zaid (may Allah be pleased with him) says: I saw the Noble Prophet (peace and blessings be upon him) joining Sayyiduna Hasan and Sayyiduna Husain (may Allah be pleased with them both) with himself while saying: "These two are my sons and the sons of Fatimah. O Allah! You know that I love them."
Hadith Referenceمعجم صغير للطبراني / كتاب المناقب / 875
Hadith Gradingمحدثین:حسن
Hadith Takhrij«حسن ، أخرجه البخاري فى «صحيحه» برقم: 3735، 3747، وابن حبان فى «صحيحه» برقم: 6967، والنسائي فى «الكبریٰ» برقم: 8115، 8127، 8471، والترمذي فى «جامعه» برقم: 3769، قال الشيخ الألباني: حسن ، والبيهقي فى«سننه الكبير» برقم: 21136، وأحمد فى «مسنده» برقم: 22244، والطبراني فى«الكبير» برقم: 2618، 2642، والطبراني فى «الأوسط» برقم: 5208، والطبراني فى «الصغير» برقم: 551 قال أبو علي الطوسي كردوش: حسنه ، إكمال تهذيب الكمال: (4 / 66)»
Narrated Usama bin Zaid: That the Prophet used to take him and Al-Hasan, and used to say, "O Allah! I love them, so please love them," or said something similar.
Shaykh Abdul Sattar al-Hammad
Hadith Commentary: In one narration, it is mentioned that Usamah bin Zayd (radi Allahu anhu) says that the Messenger of Allah (sallallahu alayhi wa sallam) would seat me on one thigh and al-Hasan (radi Allahu anhu) on the other, then he would embrace us both and supplicate: “O Allah! Show mercy and kindness to both of them, for I myself show affection to them.” (Sahih al-Bukhari, al-Adab, Hadith: 6003) From this, the virtue of al-Hasan (radi Allahu anhu) becomes evident.
Source: Hidayat al-Qari: Commentary on Sahih Bukhari, Urdu, Page: 3747