Narrated 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 (peace_be_upon_him) gave me this kunyah. Thereupon he said: The Apostle of Allah (peace_be_upon_him) 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.