The Prophet (SAWA) said, ‘Whoever backbites a Muslim man or woman, Allah, most High, neither accepts his prayer nor his fasting for forty days until its victim has forgiven him.
رسولُ اللهِ (صَلَّيَ اللهُ عَلَيهِ وَ آلِهِ): مَنِ اغتابَ مُسلماً أو مُسلِمَةً لَم يَقبَلِ اللّهُ تعالى صلاتَهُ ولا صِيامَهُ أربَعينَ يَوماً ولَيلةً، إلّا أن يَغفِرَ لَهُ صاحِبُهُ.
Similar narrations
Mīzān al-Ḥikma #298The Prophet (SAWA) said, ‘Whoever backbites a fellow Muslim man or woman, Allah neither accepts his prayer nor his fasting for forty days...