"Until, when he reached the setting of the sun, he found it set in a spring of murky water: Near it he found a People: We said: “O Zul-qarnain! (thou hast authority,) either to punish them, or to treat them with kindness." - Quran 18:86 (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)

"...it is clear that the circumcision of girls – which is the topic under discussion here – is part of the fitrah of Islam, and the way it is to be done is the method that the Messenger of Allaah (peace and blessings of Allaah be upon him) explained. It is not right to abandon his teachings for the view of anyone else, even if that is a doctor, because medicine is knowledge and knowledge is always developing and changing." - Shaykh Jaad al-Haqq ‘Ali Jaad al-Haqq