Question 50: A slight clash took place between a wife and her husband. As a result, the wife got angry at her husband and started speaking ill of him and cursing him and his parents. The husband is inquiring about the ruling on this act. Does his wife become unlawful for him as a result of her act? We hope that you attend to this issue and answer us. May Allaah reward you the best for serving Islaam and Muslims. May Allaah safeguard you.
Answer: First, it is a major sin to curse a Muslim. It was authentically reported on the authority of Thaabit ibn Al-Dahhaak that the Messenger of Allaah (peace be upon him) said: “A person is not bound to fulfill a vow about a thing which they do not possess” , “If somebody curses a believer, their sin will be as if they murdered him” , “If somebody commits suicide with anything, they will be tortured with that very thing on the Day of Resurrection” , “Whoever falsely swears by a religion other than Islaam will be as they profess” and “Whoever accuses a believer of Kufr (disbelief), it is as if they killed him.“... read more here.