Hadith 7:
It was narrated that Abu Hurayrah (r.a) said: The Messenger of Allah (s.a.w) said: «Shaytan comes to one of you and says: Who created such and such? Who created such and such? Until he says: Who created your Lord? If he goes that far, let him seek refuge with Allah and stop these thoughts.»
According to another version: «People will keep asking questions until they say: this is Allah, the Creator of all things, but who created Allah?»
In Musnad al-Imam Ahmad it is narrated with a sahih isnad: «If one of you experiences that,
let him say: I believe in Allah and His Messengers, for that will take that thought away from
his mind.»
Abu Dawud narrated that Abu Hurayrah said: I heard the Messenger of Allah (s.a.w) and he narrated a similar report, then he said: «….then if they say that, then say: "He is Allah,[who is] One, Allah, the Eternal Refuge. He neither begets nor is born, Nor is there to Him any equivalent." Then let him spit dryly to his left three times, and seek refuge with Allah from the accursed Shaytan.»