Sahih al-Bukhari 6949
(Statements made under) Coercion
If a woman is compelled to commit illegal sexual intercourse against her will
And Safiyya bint 'Ubaid said: "A governmental male-slave tried to seduce a slave-girl from the Khumus of the war booty till he deflowered her by force against her will; therefore 'Umar flogged him according to the law, and exiled him, but he did not flog the female slave because the male-slave had committed illegal sexual intercourse by force, against her will." Az-Zuhri said regarding a virgin slave-girl raped by a free man: The judge has to fine the adulterer as much money as is equal to the price of the female slave and the adulterer has to be flogged (according to the Islamic Law); but if the slave woman is a matron, then, according to the verdict of the Imam, the adulterer is not fined but he has to receive the legal punishment (according to the Islamic Law).