Sahih al-Bukhari 3539
Sahih al-Bukhari · Book 61: Virtues and Merits of the Prophet (pbuh) and his Companions · The Kunya of the Prophet (saws)
Narrated Abu Huraira:
حَدَّثَنَا عَلِيُّ بْنُ عَبْدِ اللَّهِ ، حَدَّثَنَا سُفْيَانُ ، عَنْ أَيُّوبَ ، عَنِ ابْنِ سِيرِينَ ، قَالَ سَمِعْتُ أَبَا هُرَيْرَةَ ، يَقُولُ قَالَ أَبُو الْقَاسِمِ صلى الله عليه وسلم " سَمُّوا بِاسْمِي، وَلاَ تَكْتَنُوا بِكُنْيَتِي "
Abu-l-Qasim said, "Name yourselves after me, but do not call yourselves by my Kuniya."