Musnad Abu Ya'la al-Mawsili 42:345

Zuhayr narrated to us, Affan narrated to us, Hammam narrated to us, from Qatadah, from Abu al-Khalil, from Abu Alqamah al-Hashimi, from Abu Sa’id al-Khudri: That they captured women who had husbands on the day they conquered Awtas, and some men among them disliked [having relations with] them. Then Allah revealed this verse: "And [also prohibited to you are] all married women except those your right hands possess."