Verses with the word unrighteous in the Old Testament (5 verses):

Exodus 23:1
Thou shalt not raise a false report: put not thine hand with the wicked to be an unrighteous witness.

Job 27:7
Let mine enemy be as the wicked, and he that riseth up against me as the unrighteous.

Psalms 71:4
Deliver me, O my God, out of the hand of the wicked, out of the hand of the unrighteous and cruel man.

Isaiah 10:1
Woe unto them that decree unrighteous decrees, and that write grievousness which they have prescribed;

Isaiah 55:7
Let the wicked forsake his way, and the unrighteous man his thoughts: and let him return unto the LORD, and he will have mercy upon him; and to our God, for he will abundantly pardon.