"Prohibited to you (For marriage) are:- Your mothers, daughters, sisters; father's sisters, Mother's sisters; brother's daughters, sister's daughters; foster-mothers (Who gave you suck), foster-sisters; your wives' mothers; your step-daughters under your guardianship, born of your wives to whom ye have gone in,- no prohibition if ye have not gone in;- (Those who have been) wives of your sons proceeding from your loins; and two sisters in wedlock at one and the same time, except for what is past; for Allah is Oft-forgiving, Most Merciful;" - Quran 4:23 (read more)

"Amir b. Sa'd reported on the authority of his father that Allah's Apostle (may peace be upon him) commanded the killing of geckos, and he called them little noxious creatures." - Sahih Muslim 26:5562 (read more)

"With regard to the criticism of [female] circumcision by some doctors, and their claim that it is harmful both physically and psychologically. This criticism of theirs is not valid. It is sufficient for us Muslims that something be proven to be from the Prophet (peace and blessings of Allaah be upon him), then we will follow it,... If it were harmful, Allaah and His Messenger (peace and blessings of Allaah be upon him) would not have prescribed it for us." - Islam Q&A