"The punishment of those who wage war against Allah and His Messenger, and strive with might and main for mischief through the land is: execution, or crucifixion, or the cutting off of hands and feet from opposite sides, or exile from the land: that is their disgrace in this world, and a heavy punishment is theirs in the Hereafter;" - Quran 5:33 (read more)

"Narrated Qatada: Anas bin Malik said, "The Prophet used to visit all his wives in a round, during the day and night and they were eleven in number." I asked Anas, "Had the Prophet the strength for it?" Anas replied, "We used to say that the Prophet was given the strength of thirty (men)." And Sa'id said on the authority of Qatada that Anas had told him about nine wives only (not eleven)." - Sahih Bukhari 1:5:268 (read more)

"The Shaafa’is, the Hanbalis according to the well-known view of their madhhab, and others are of the view that circumcising women is obligatory. Many scholars are of the view that it is not obligatory in the case of women; rather it is Sunnah and is an honour for them. But we would like to point out here that it has medical benefits to which attention should be paid, regardless of the difference of opinion among the scholars as to whether it is obligatory or mustahabb." - Islam Q&A