Al-Ahzab 33:8

Liyas-ala assadiqeena AAan sidqihimwaaAAadda lilkafireena AAathaban aleema

That He may question the truthful about their truth. And He has prepared for the disbelievers a painful punishment.

so that He (Allah) may ask the truthful ones about their truth. And He has prepared a painful punishment for the disbelievers.