Surah Al-Furqan 25:26

ٱلْمُلْكُ يَوْمَئِذٍ ٱلْحَقُّ لِلرَّحْمَـٰنِ ۚ وَكَانَ يَوْمًا عَلَى ٱلْكَـٰفِرِينَ عَسِيرًا

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

Translation: Saheeh International

Tafsir

true Sovereignty on that day will belong to the Compassionate One with no one else sharing it with Him and it that day will be a hard day for the disbelievers in contrast to the believers.

Excerpt from Tafsir al-Jalalayn, commentary on 25:26, via Quran.com. The reader has the full commentary and 9 more tafsirs.