Sahih al-Bukhari
Sahih al-Bukhari 2120
حَدَّثَنَا آدَمُ بْنُ أَبِي إِيَاسٍ، حَدَّثَنَا شُعْبَةُ، عَنْ حُمَيْدٍ الطَّوِيلِ، عَنْ أَنَسِ بْنِ مَالِكٍ ـ رضى الله عنه ـ قَالَ كَانَ النَّبِيُّ صلى الله عليه وسلم فِي السُّوقِ، فَقَالَ رَجُلٌ يَا أَبَا الْقَاسِمِ. فَالْتَفَتَ إِلَيْهِ النَّبِيُّ صلى الله عليه وسلم فَقَالَ إِنَّمَا دَعَوْتُ هَذَا. فَقَالَ النَّبِيُّ صلى الله عليه وسلم " سَمُّوا بِاسْمِي، وَلاَ تَكَنَّوْا بِكُنْيَتِي ".
Adam ibn Abi Iyas narrated to us: Shuba narrated to us, from Humayd al-Tawil, from Anas ibn Malik, may Allah be pleased with him, who said: The Prophet was in the market when a man called out, “O Abu al-Qasim.” The Prophet turned toward him. The man said, “I meant this other person.” The Prophet said, “Name yourselves with my name, but do not use my kunya.”
Translation notes
The man explains that he was addressing someone else with the same kunya. The source does not include the explanatory note about naming customs or the cross-reference found in the witness.