Musannaf Ibn Abi Shayba 19:726

Abu Bakr narrated to us, he said: Jarir narrated to us, from Mughira, from Ibn Yasar, a freed slave of Uthman, who said: Uthman flogged a woman for adultery, then he sent her with a freed slave of his called al-Mahri to Khaybar. He exiled her to it.