Musannaf Ibn Abi Shayba 9:878

Waki’ narrated to us, from Abu Janab, from Bukayr ibn al-Akhnas, from Abu [al-Ahwas], who said: I recited at night "Ha-Mim ‘Ayn-Sin-Qaf." I passed by this verse: "And it is He who accepts repentance from His servants and pardons misdeeds, and He knows what you do." So I went early in the morning to Abdullah [ibn Mas’ud] to ask him about it. A man came to him and asked him about a man who commits adultery with a woman and then marries her. Abdullah recited: "And it is He who accepts repentance from His servants and pardons misdeeds."