In Job 12:9, Job repeats the same rhetorical question 'Who knoweth not?' from 12:3, emphasizing common knowledge.

Job 13:2-5 directly continues Job's claim of equal understanding and then rebukes the friends as worthless physicians — same speech.

In Job 11:12, Zophar says the empty man pretends to be wise, directly countering Job's claim to understanding in 12:3.

In Job 38:2, God rebukes Job for darkening counsel without knowledge, directly contradicting Job's claim of understanding in 12:3.

2 Corinthians 11:5 has Paul claim 'I was not a whit behind the chiefest apostles' — identical phrasing to Job's 'I am not inferior'.