Musannaf Ibn Abi Shayba 19:216

Abu Bakr narrated to us, he said: Jarir narrated to us, from Mansur, he said: I met Abd al-Rahman ibn Ma'qil. He said: "Did you see the slave woman whom your father, Abdullah, asked about—that she committed adultery, so he ordered her to be flogged—if she had been married?" He said: "No."