There the believers were tried and severely shaken.
Sayyed Abbas Sadr-Ameli
There it was that the believers were tried, and they were shaken a tremendous shaking
Al-muntakhab fi tafsir al-Qur'an al-Karim
There and in that extreme situation were those who conformed to Islam tested. Their actions, their thoughts and their disposition mirrored their spirit-high or low and their will -poor or strong- in the face of the extreme danger which really shook them and quaked them with fear