Verses with the word unwise in the Old Testament (2 verses):

Deuteronomy 32:6
Do ye thus requite the LORD, O foolish people and unwise? is not he thy father that hath bought thee? hath he not made thee, and established thee?

Hosea 13:13
The sorrows of a travailing woman shall come upon him: he is an unwise son; for he should not stay long in the place of the breaking forth of children.