#10 Cursing
Book of Good Manners and Form (Al-Adab)
(4) Chapter: A man should not abuse his parents
Hadeeth 5973
Narrated `Abdullah bin `Amr:
Allah’s Messenger صلى الله عليه و سلم said. “It is one of the greatest sins that a man should curse his parents.” It was asked (by the people), “O Allah’s Messenger صلى الله عليه و سلم! How does a man curse his parents?” The Prophet صلى الله عليه و سلم said, “‘The man abuses the father of another man and the latter abuses the father of the former and abuses his mother.”