When the wicked spring as the grass; i.e. "spring up"—"flourish" (see Psalms 92:12). The difficulty is that which disturbed Job (Job 21:7-21) and Asaph (Psalms 73:2-15), viz. the prosperity of the wicked.
The present writer, however, is not disturbed—he sees in their prosperous condition nothing but a prelude to their overthrow. And when all the workers of iniquity do flourish; or, "do blossom." It is that they shall be destroyed forever; literally, it is for their destruction forever (comp.