The Book of Manners and Etiquette
Ṣaḥīḥ Muslim 5588
تَسَمَّوْا بِاسْمِي وَلاَ تَكْتَنُوا بِكُنْيَتِي فَإِنَّمَا أَنَا قَاسِمٌ أَقْسِمُ بَيْنَكُمْ
tasammawā bāsmī walā taktanūā bikunyatī fa-innamā anā qāsimun aqsimu baynakum
Transliteration generated from the Arabic vowel marks
The full narration
Jabir b. 'Abdullah reported that a child was born to a person amongst us and he gave him the name of Muhammad. Thereupon his people said:We will not allow You to give the name of Muhammad (to your child) after the name of Allah's Messenger (ﷺ). He set forth with his son carrying him on his back and came to Allah's Apostle (ﷺ), and said: Allah's Messenger a son has been born to me and I have given him the name after the name of Allah's Messenger (ﷺ), whereupon Allah's Messenger (ﷺ) said: Give him my name but do not give him my kunya, for I am Qasim in the sense that I distribute (the spoils of war) and the dues of Zakat amongst you
Source
Ṣaḥīḥ Muslim · 5588