From Sahih Bukhari (Hadith 3542):
Narrated `Uqba bin Al-Harith:(Once) Abu Bakr offered the `Asr prayer and then went out walking and saw Al-Hasan playing with the boys. He lifted him on to his shoulders and said, " Let my parents be sacrificed for your sake! (You) resemble the Prophet (ﷺ) and not `Ali," while `Ali was smiling
Reference: Bukhari 3542