"...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 'Abdullah bin 'Umar : The Jew brought to the Prophet a man and a woman from amongst them who have committed (adultery) illegal sexual intercourse. He ordered both of them to be stoned (to death), near the place of offering the funeral prayers beside the mosque." - Sahih Bukhari 7:62:64 (read more)

"We must remind the ignorant from among the Islamic Nation who followed the [West] that those [Westerners] acknowledge the wondrous nature of this verse [4:34]... Allah has created woman, whether Muslim or infidel, so she is happy under a strong man who will protect her and lives with her...[The Koran says:] 'and beat them.' This verse is of a wondrous nature." - Muslim cleric on Qatar TV