Surah Al-Ahzab 33:11

هُنَالِكَ ٱبْتُلِىَ ٱلْمُؤْمِنُونَ وَزُلْزِلُوا۟ زِلْزَالًا شَدِيدًا

There the believers were tested and shaken with a severe shaking.

Translation: Saheeh International

Tafsir

it was there that the believers were sorely tried there they were tested to distinguish the sincere individual from the one otherwise and were shaken with a mighty shock because of the severity of the terror.

Excerpt from Tafsir al-Jalalayn, commentary on 33:11, via Quran.com. The reader has the full commentary and 9 more tafsirs.