The fatwa applies to females between the ages of 11 and 46.
Islamic apologists have repeatedly claimed that FGM has nothing to do with Islam. The Caliph of the Islamic State disagrees.
Abu Bakr al-Baghdadi, Caliph of the Islamic State, has ordered all families around Iraq's northern city of Mosul to circumcise their daughters or face severe punishment.
The female genital mutilation, which would potentially affect four million women and girls, is to "distance them from debauchery and immorality".
A spokesman for Mosul police, Ahmed Obaydi, said: "Baghdadi's decision to have all women circumcised is, as he claims, to prevent immorality and promote Islamic attitudes among Muslims. The decision was made by Baghdadi as a 'gift' for people in Mosul."
UN official Jacqueline Badcock said the fatwa, or religious edict, applied to females between the ages of 11 and 46.
Zanun Majid, a citizen in Mosul, told BasNews: "Due to this decision, many girls fear for their lives, not knowing where to flee, otherwise risking severe punishment by staying."
This is what Islamic law looks like. This is why it has to be resisted and kept out of every country. This is why there can be no compromise with Sharia.