John Gill Commentary Job 34:35

"Job speaketh without knowledge, And his words are without wisdom." — Job 34:35 (ASV)

Job has spoken without knowledge
Not that Job was an ignorant man, either in things natural or divine; but in this point, about the chastening hand of God upon him, he had said some things which betrayed lack of knowledge, as in (Job 34:5) ;

and his words [were] without wisdom ;
Job was not destitute of human wisdom, nor of spiritual wisdom, but no man is wise at all times; some things had dropped from him which savoured of folly and ignorance, and which he afterwards was convinced of, and confessed with shame, (Job 40:4Job 40:5) (42:3) ; being charged by the Lord himself with what he is here by Elihu, (Job 38:2) ; and it may be observed, that Elihu does not charge Job with being a wicked man, as his three friends did, but as having spoken unadvisedly with lips, under his chastening circumstances, and which he labours to convince him of.