يُوفُونَ بِالنَّذْرِ وَيَخَافُونَ يَوْمًا كَانَ شَرُّهُ مُسْتَطِيرًا
[76:7]
They fulfill vows and fear a day the evil of which shall be spreading far and wide.
They perform (their) vows, and they fear a Day whose evil flies far and wide.
(Because) they perform the vow and fear a day whereof the evil is wide-spreading,