Musannaf Ibn Abi Shayba 9:1028

Waki' narrated to us, from Sufyan, from Habib ibn Abi 'Amra, from Sa'id ibn Jubayr, from Ibn 'Abbas, who said: "The fornicator does not marry except a fornicatress or a polytheist." He means by "marriage" (nikah): he has sexual intercourse with her.