Surah Ar-Rum 30:12

وَيَوْمَ تَقُومُ ٱلسَّاعَةُ يُبْلِسُ ٱلْمُجْرِمُونَ

And the Day the Hour appears the criminals will be in despair.

Translation: Saheeh International

Tafsir

And on the Day when the Hour comes the sinners will be dumbfounded the idolaters will be fall into silence as their line of argument can no longer be continued.

Excerpt from Tafsir al-Jalalayn, commentary on 30:12, via Quran.com. The reader has the full commentary and 9 more tafsirs.