[The truly virtuous are] they [who] fulfil their vows, and stand in awe of a Day the woe of which is bound to spread 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,

They fulfil vows and fear a day, the evil of which is widespread.

They [are those who] fulfill [their] vows and fear a Day whose evil will be widespread.