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).
Reference | : Sahih Muslim 2763b |
In-book reference | : Book 50, Hadith 48 |
USC-MSA web (English) reference | : Book 37, Hadith 6656 |
(deprecated numbering scheme) |