Jamieson, Fausset and Brown on Job 31:34

34. Rather, the apodosis to Job 31:33, "Then let me be fear-stricken before a great multitude, let the contempt, &c., let me keep silence (the greatest disgrace to a patriot, heretofore so prominent in assemblies), and not go out," &c. A just retribution that he who hides his sin from God, should have it exposed before man (2Sa 12:12). But Job had not been so exposed, but on the contrary was esteemed in the assemblies of the "tribes"--("families"); a proof, he implies, that God does not hold him guilty of hiding sin (Job 24:16, contrast with Job 29:21-25).