Oh that ye would altogether hold your peace! - You would show your wisdom by silence. Since you can say nothing that is adapted to give comfort, or to explain the true state of the case, it would be wise to say nothing; compare Proverbs 17:28 : “Even a fool when he holdeth his peace is counted wise.”
Related Commentaries of Job 13:5
Job 13:5
5 O that ye would altogether hold your peace! and it should be your wisdom.