When is doubt in matters of religion considered disbelief?

The questioner:
Yes. Peace be upon you, Your Eminence, father. The questioner says: In the saying of Allah, Glorious and Exalted is He, He asks: Does His saying, "then they did not doubt," indicate that one who doubts and has uncertainty is lowered to the level of Islam? Or does he exit Islam merely by having doubt?

The Shaykh:
Doubt varies; it may cause one to exit Islam, or it may diminish his Islam and his faith. So doubt varies. Yes, I say that doubt varies. If the doubt is in a matter that is established, if the doubt is in a matter established by Allah and His Messenger, then this is disbelief. But if the doubt is in a probable matter, in a probable matter, then if the preponderance of one side becomes clear, it is not permissible for a person to doubt; rather, he should take the stronger position. But if the preponderance of either side does not become clear and he remains hesitant, there is no blame on him in that until it becomes clear to him, until the stronger position becomes clear to him from the independent legal reasoning and the opinions. Yes.