Proverbs 15:21

Folly is joy to him that is destitute of wisdom: but a man of understanding walketh uprightly.
— Proverbs 15:21, King James Version

In other translations

World English Bible (WEB)

Folly is joy to one who is void of wisdom, But a man of understanding keeps his way straight.

American Standard Version (ASV)

Folly is joy to him that is void of wisdom; But a man of understanding maketh straight his going.

Young's Literal Translation (YLT)

Folly is joy to one lacking heart, And a man of intelligence directeth <FI>his<Fi> going.