Verses with the word unrighteousness in the Old Testament (4 verses):

Leviticus 19:15
Ye shall do no unrighteousness in judgment: thou shalt not respect the person of the poor, nor honor the person of the mighty: but in righteousness shalt thou judge thy neighbour.

Leviticus 19:35
Ye shall do no unrighteousness in judgment, in meteyard, in weight, or in measure.

Psalms 92:15
To shew that the LORD is upright: he is my rock, and there is no unrighteousness in him.

Jeremiah 22:13
Woe unto him that buildeth his house by unrighteousness, and his chambers by wrong; that useth his neighbour's service without wages, and giveth him not for his work;