Charles Ellicott Commentary Job 36:4

"For truly my words are not false: One that is perfect in knowledge is with thee." — Job 36:4 (ASV)

He that is perfect in knowledge. —We may presume that he meant God; but in the Authorised Version it looks very much as though he meant himself. (Compare to Job 37:16.) So apparently Vulgate, “perfecta scientia probabitur tibi.”