(1) باب النَّهْىِ عَنِ التَّكَنِّي، بِأَبِي الْقَاسِمِ وَبَيَانِ مَا يُسْتَحَبُّ مِنَ الأَسْمَاءِ .
Anas reported that person at Baqi' called another person as" Abu'l- Qasim," and Allah's Messenger (ﷺ) turned towards him. He (the person who had uttered these words) said:
Messenger of Allah, I did not mean you, but I called such and such (person), whereupon Allah's Messenger (ﷺ) said: You may call yourself by my name, but not by my kunya. (DE)
Reference (DE): Sahih Muslim 2131 (DE)
In-book reference (DE): Book 38, Hadith 1 (DE)
USC-MSA web (English) reference(deprecated numbering scheme): Book 25, Hadith 5314 (DE)