Abu Dawud Book 36, Hadith Number 4945.

Chapter : Not known.

Narated By Umar ibn al-Khattab : Zayd ibn Aslam quoted his father as saying: Umar ibn al-Khattab (Allah be pleased with him) struck one of his sons who was given the kunyah AbuIsa, and al-Mughirah ibn Shu’bah had the kunyah AbuIsa. Umar said to him: Is it not sufficient for you that you are called by the kunyah AbuAbdullah? He replied: The Apostle of Allah (PBUH) gave me this kunyah. Thereupon he said: The Apostle of Allah (PBUH) was forgiven all his sins, past and those followed. But we are among the people similar to us. Henceforth he was called by the kunyah AbuAbdullah until he died.