FGM in Islamic sources.
Narrated Umm Atiyyah al-Ansariyyah: A woman used to perform circumcision in Medina. The Prophet said to her: Do not cut severely as that is better for a woman and more desirable for a husband. Abu Dawud 41:5251
Umm al-Muhajir said, “I was captured with some girls from Byzantium. ‘Uthman offered us Islam, but only myself and one other girl accepted Islam. ‘Uthman said, ‘Go and circumcise them and purify them.'” Al-adab al mufrad 53:1245
The Messenger of Allah said: When anyone sits amidst four parts (of the woman) and the circumcised parts touch each other a bath becomes obligatory. Muslim 3:684
Umm ‘Alqama related that when the daughters of ‘A’isha’s brother were circumcised (al-adab al amufrad 53:1247)
Circumcision is obligatory (O: for both men and women. For men it consists of removing the prepuce from the penis, and for women, removing the prepuce (Ar. bazr) of the clitoris (n: not the clitoris itself, as some mistakenly assert). (A: Hanbalis hold that circumcision of women is not obligatory but sunna, while Hanafis consider it a mere courtesy to the husband.). Reliance of the Traveller p59