One sign of these people is that, when such states descend upon them while they listen to whistling and clapping, they froth at the mouth and tremble—like someone possessed—and utter words whose meaning cannot be understood. The devils speak through their tongues, just as they speak through the tongue of someone possessed.

The fundamental principle in this matter is to know that the friends of Allah are those whom Allah describes in His Book, saying:

“Indeed, the friends of Allah will have no fear, nor will they grieve—those who believe and fear Allah.”

Thus, everyone who believes and fears Allah is a friend of Allah.

In an authentic hadith, the Prophet, may Allah bless him and grant him peace, said:

“Allah Most High says: ‘Whoever shows enmity to a friend of Mine has openly challenged Me to war. My servant draws near to Me through nothing like fulfilling what I have made obligatory upon him. My servant continues to draw near to Me through voluntary acts of worship until I love him. When I love him, I am his hearing with which he hears, his sight with which he sees, his hand with which he grasps, and his foot with which he walks. Through Me he hears, through Me he sees, through Me he grasps, and through Me he walks. If he asks Me, I will surely give him; and if he seeks My protection, I will surely protect him. I have never hesitated over anything I am going to do as I hesitate over taking the soul of My believing servant: he dislikes death, and I dislike causing him distress, yet he must undergo it.’”

The religion of Islam is founded on two principles: that we worship none but Allah, and that