Breach of Promise

“I heard Abu ‘Abdillah (a.s.) saying, ‘The promise of a believer to his brother (in belief) is a vow that has no expiation. Whoever violates it has initiated to violate Allah and has subjected himself to His anger as it…

“The Messenger of Allah has said, ‘Whoever believes in Allah, and in the Day of Judgment, must fulfill his promise.’”