Satan. The same source of ideas for the Grand Mufti of Jerusalem.
Quran 72:1 Say (Muhammad): It has been revealed to me that a group of (three to ten) Jinn [demons or devils] listened (to the Quran). They said, We have heard a really wonderful recital (of this Quran)! It guides to the Right Path. We have come to believe it. We shall not associate anything with our Lord.
Too bad Muslims can't see that they are worshiping Satan, not God.