وَعَنْ جُنْدُبٍ رَضِيَ اللَّهُ عَنْهُ
أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ حَدَّثَ: «أَنَّ رَجُلًا قَالَ: وَاللَّهِ لَا يَغْفِرُ اللَّهُ لِفُلَانٍ وَأَنَّ اللَّهَ تَعَالَى قَالَ: مَنْ ذَا الَّذِي يَتَأَلَّى عَلَيَّ أَنِّي لَا أَغْفِرُ لِفُلَانٍ فَإِنِّي قَدْ غَفَرْتُ لِفُلَانٍ وَأَحْبَطْتُ عَمَلَكَ». أَوْ كَمَا قَالَ
God’s messenger told of a man saying, “I swear by God that God will not forgive so and so,” whereupon God most high said, “Who is this who swears that I will not forgive so and so? For I have forgiven so and so and have made your deeds to come to nothing”, or words to that effect.
Mishkat al-Masabih 2234, Book 10, Supplications, Hadith 108. 1 min read