Sahih al-Bukhari · Hadith 3537

Virtues and Merits of the Prophet (pbuh) and his Companions

Narrated Anas: While the Prophet (ﷺ) was in the market, a man called (somebody), "O Abu-l-Qasim!' The Prophet (ﷺ) turned to him and said "Name yourselves after me but do not call yourselves by my Kuniya