Surety — These words contain, an humble desire to God that he would be his surety, or appoint him a surety who should maintain his righteous cause against his opposers. Strike hands — Be surety to me; whereof that was the usual gesture.
Related Commentaries of Job 17:3
Job 17:3
3 Lay down now, put me in a surety with thee; who is he that will strike hands with me?