Musannaf Ibn Abi Shayba 9:1003

Mu'awiyah ibn Hisham narrated to us, he said: Sharik narrated to us, from 'Ata' ibn al-Sa'ib, from Sa'id ibn Jubayr, from Ibn 'Abbas regarding [the verse]: "And [also prohibited to you are] all married women [al-muhsanat min al-nisa']" — [he said]: All of them, except those who are married among the captives.