Sahih Muslim 6681
صحيح مسلم#6681Sahihحَدَّثَنَا سُوَيْدُ بْنُ سَعِيدٍ، عَنْ مُعْتَمِرِ بْنِ سُلَيْمَانَ، عَنْ أَبِيهِ، حَدَّثَنَا أَبُو عِمْرَانَ الْجَوْنِيُّ، عَنْ جُنْدَبٍ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم حَدَّثَ " أَنَّ رَجُلاً قَالَ وَاللَّهِ لاَ يَغْفِرُ اللَّهُ لِفُلاَنٍ وَإِنَّ اللَّهَ تَعَالَى قَالَ مَنْ ذَا الَّذِي يَتَأَلَّى عَلَىَّ أَنْ لاَ أَغْفِرَ لِفُلاَنٍ فَإِنِّي قَدْ غَفَرْتُ لِفُلاَنٍ وَأَحْبَطْتُ عَمَلَكَ " . أَوْ كَمَا قَالَ .
Jundub reported that Allah's Messenger (ﷺ) stated that a person said:Allah would not forgive such and such (person). Thereupon Allah the Exalted and Glorious, said: Who is he who adjures about Me that I would not grant pardon to so and so; I have granted pardon to so and so and blotted out his deeds (who took an oath that I would not grant pardon to him)
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 45:178