Verses with the word justify in the Old Testament (7 verses):

Exodus 23:7
Keep thee far from a false matter; and the innocent and righteous slay thou not: for I will not justify the wicked.

Deuteronomy 25:1
If there be a controversy between men, and they come unto judgment, that the judges may judge them; then they shall justify the righteous, and condemn the wicked.

Job 9:20
If I justify myself, mine own mouth shall condemn me: if I say, I am perfect, it shall also prove me perverse.

Job 27:5
God forbid that I should justify you: till I die I will not remove mine integrity from me.

Job 33:32
If thou hast anything to say, answer me: speak, for I desire to justify thee.

Isaiah 5:23
Which justify the wicked for reward, and take away the righteousness of the righteous from him!

Isaiah 53:11
He shall see of the travail of his soul, and shall be satisfied: by his knowledge shall my righteous servant justify many; for he shall bear their iniquities.