Al-Furqan 25:26

Almulku yawma-ithin alhaqqu lirrahmaniwakana yawman AAala alkafireena AAaseera

True sovereignty, that Day, is for the Most Merciful. And it will be upon the disbelievers a difficult Day.

the Kingdom on that day will be for the RaHmān (the All-Merciful, Allah), and it will be a difficult day for the disbelievers.