The arrow cannot make him flee: slingstones are turned with him into stubble.
Arrow - literally, the son of the bow; Oriental imagery, (Lamentations 3:13, margin.)
Stubble - sling stones produce no more effect than it would to throw stubble at him.
Related Commentaries of Job 41:28
Job 41:28
28 The arrow cannot make him flee: slingstones are turned with him into stubble.