Harvest — Which they confidently expect to reap after all their cost and labour, but are sadly and suddenly disappointed. The hungry — The hungry Sabeans eat it up. Thorns — Out of the fields: in spite of all dangers or difficulties in their way.
Related Commentaries of Job 5:5
Job 5:5
5 Whose harvest the hungry eateth up, and taketh it even out of the thorns, and the robber swalloweth up their substance.