Sunan Abi Dawud

‘Abd Allah b. ‘Amr (b. al-As) reported the Messenger of Allah (May peace be upon him) as saying:A man’s reviling of his parents is one of the grave sins. He was asked : Messenger of Allah! How does a man revile his parents? He replied: He reviles the father of a man who then reviles his father, and he reviles a man’s mother and he reviles his