"Men are overseers over women, by reason of that wherewith Allah hath made one of them excel over another, and by reason of that which they expend of their substance. Wherefore righteous women are obedient, and are watchers in husbands absence by the aid and protection of Allah. And those wives whose refractoriness ye fear, exhort them, and avoid them in beds, and beat them; but if they obey you, seek not a way against them; verily Allah is ever Lofty, Grand." - Quran 4:34 (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)

"If anyone rejects the [uncurrupted] message of Jesus (peace be upon him) or the [uncurrupted] message of Moses (peace be upon him) or the message of Muhammad (peace and blessings of Allaah be upon him), he is a kaafir (disbeliever). If anyone denies that this Qur’aan was revealed from God, or mocks it, he is a kaafir, because the Qur'aan was revealed from Allaah." - Islam Q&A