Sahih al-Bukhari 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.
حَدَّثَنَا أَبُو عَاصِمٍ، عَنْ عُمَرَ بْنِ سَعِيدِ بْنِ أَبِي حُسَيْنٍ، عَنِ ابْنِ أَبِي مُلَيْكَةَ، عَنْ عُقْبَةَ بْنِ الْحَارِثِ، قَالَ صَلَّى أَبُو بَكْرٍ ـ رضى الله عنه ـ الْعَصْرَ، ثُمَّ خَرَجَ يَمْشِي فَرَأَى الْحَسَنَ يَلْعَبُ مَعَ الصِّبْيَانِ، فَحَمَلَهُ عَلَى عَاتِقِهِ وَقَالَ بِأَبِي شَبِيهٌ بِالنَّبِيِّ لاَ شَبِيهٌ بِعَلِيٍّ‏.‏ وَعَلِيٌّ يَضْحَكُ‏.‏