Anas b. Malik transmitted it from the Messenger of Allah (ﷺ) that the Great and Glorious Allah said:Verily your people would constantly question about this and that till they would say: Well, it is Allah Who created the creation, but who created Allah?

This hadith has been narrated by another chain of transmitters with the exception that Ishaq made no mention of this:Allah said: Verily your people