"...If the party liable is mentally deficient, or weak, or unable Himself to dictate, Let his guardian dictate faithfully, and get two witnesses, out of your own men, and if there are not two men, then a man and two women, such as ye choose, for witnesses, so that if one of them errs, the other can remind her. The witnesses should not refuse when they are called on (For evidence)." - Quran 2:282 (read more)

"Narrated Kurib: the freed slave of Ibn 'Abbas, that Maimuna bint Al-Harith told him that she manumitted a slave-girl without taking the permission of the Prophet. On the day when it was her turn to be with the Prophet, she said, "Do you know, O Allah's Apostle, that I have manumitted my slave-girl?" He said, "Have you really?" She replied in the affirmative. He said, "You would have got more reward if you had given her (i.e. the slave-girl) to one of your maternal uncles." - Sahih Bukhari 3:47:765 (read more)

"We must know that [wife] beating is a punishment in Islamic religious law,....No one should deny this because this was permitted by the Creator of Man, and because when you purchase an electric appliance or a car you get instructions – a catalogue, explaining how to use it. The Creator of Man has sent down this book [the Quran] in order to show man which ways he must choose....We shouldn't be ashamed before the nations of the world who are still in their days of ignorance, to admit that these [beatings] are part of our religious law..." - Muslim cleric on Qatar TV