Musnad Abu Ya'la al-Mawsili 1:37

Zuhayr ibn Harb narrated to us, Qabisah narrated to us, Sufyan narrated to us, from ‘Amr ibn Sa‘id ibn Abi Husayn, from Ibn Abi Mulaykah, from ‘Uqbah ibn al-Harith, who said: I saw Abu Bakr carrying al-Hasan ibn ‘Ali and saying: "May my father be sacrificed for you, you resemble the Prophet and you do not resemble ‘Ali." And ‘Ali was with him, smiling.