If your soul. — i.e., person=“ If you were in my place, I could heap up words,” &c. It is doubtful whether this is in contrast to what comes afterwards in the fifth verse, as in the Authorised Version, or whether it may not be in parallelism with it; thus: “I would make myself a companion to you — condole and sympathise with you. in words, and shake my head at you as a mark of sympathy.” The phrase differs somewhat from that in Psalms 22:7; Isaiah 37:22, where to shake the head expresses contempt and derision.
Related Commentaries of Job 16:4
Job 16:4
4 I also could speak as ye do: if your soul were in my soul's stead, I could heap up words against you, and shake mine head at you.