General Behavior (Kitab Al-Adab)

Dawud :: Book 41 : Hadith 4950

Narrated Aisha, Ummul Mu'minin:

A woman came to the Apostle of Allah (peace_be_upon_him) and said: Apostle of Allah! I have given birth to a boy, and call him Muhammad and AbulQasim as kunyah (surname), but I have been told that you disapproved of that. He replied: What is it which has made my name lawful and my kunyah unlawful, or what is it which has made my kunyah unlawful and my name lawful?