Musnad Ahmad 30:1261

Abu al-Nadr narrated to us, Warqa’ narrated to us, from Ubayd Allah ibn Abi Yazid, from Nafi’ ibn Jubayr ibn Mut’im, from Abu Hurayrah, who said: I was with the Prophet, peace and blessings of Allah be upon him, in one of the markets of Medina. He turned away and I turned away with him. He came to the courtyard of Fatimah and called out for al-Hasan, saying: "O little rascal, O little rascal, O little rascal." He said it three times, but no one answered him. He said: So he turned away, and I turned away with him. He came to the courtyard of Aisha and sat down. He said: Then al-Hasan ibn Ali came. Abu Hurayrah said: I thought that his mother had detained him to put a necklace of beads around his neck. When he came, the Messenger of Allah, peace and blessings of Allah be upon him, embraced him, and he embraced the Messenger of Allah, peace and blessings of Allah be upon him. He said: "O Allah, I love him, so love him, and love whoever loves him," three times.