Sahih Muslim 7004
صحيح مسلم#7004Sahihحَدَّثَنَا مُحَمَّدُ بْنُ عَبْدِ الأَعْلَى، حَدَّثَنَا الْمُعْتَمِرُ، عَنْ أَبِيهِ، حَدَّثَنَا أَبُو عُثْمَانَ، عَنِ ابْنِ، مَسْعُودٍ أَنَّ رَجُلاً، أَتَى النَّبِيَّ صلى الله عليه وسلم فَذَكَرَ أَنَّهُ أَصَابَ مِنِ امْرَأَةٍ إِمَّا قُبْلَةً أَوْ مَسًّا بِيَدٍ أَوْ شَيْئًا كَأَنَّهُ يَسْأَلُ عَنْ كَفَّارَتِهَا - قَالَ - فَأَنْزَلَ اللَّهُ عَزَّ وَجَلَّ . ثُمَّ ذَكَرَ بِمِثْلِ حَدِيثِ يَزِيدَ .
Ibn Mas'ud reported that a person came to Allah's Messenger (ﷺ) and told him that he had kissed a woman or touched her with his hand or did something like this. He inquired of him about its expiation. It was (on this occasion) that Allah, the Exalted and Glorious, revealed this verse (as mentioned above)
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: 50:48