Job 32:9 KJV
Great men are not always wise: neither do the aged understand judgment.
Job 32:9, King James Version
In context
8 But there is a spirit in man: and the inspiration of the Almighty giveth them understanding.
9 Great men are not always wise: neither do the aged understand judgment.
10 Therefore I said, Hearken to me; I also will shew mine opinion.