Musannaf Ibn Abi Shayba 9:1568

Ibn Fudayl narrated to us, from Hajjaj, from al-Hakam, from Ibrahim, that a woman deflowered a slave girl with her finger and said, "She has committed adultery." The matter was raised to Ali, so he imposed upon her the payment of the *‘aqr* (compensation for defloration) and lashed her eighty times for slandering her.