Romans 12:19 contains one of the clearest commands in Paul's letters about what to do with injustice: "Dearly beloved, avenge not yourselves, but rather give place unto wrath: for it is written, Vengeance is mine; I will repay, saith the Lord." The Greek ekdikesis — vengeance — belongs to God specifically because he is the only one who can execute it justly. The command to release vengeance is not resignation — it is the recognition that the case is being taken up by a more competent court.
Psalm 37:6 — "And he shall bring forth thy righteousness as the light, and thy judgment as the noonday" — promises that wrongfully obscured truth will be brought into clarity. The Hebrew mishpat — judgment — includes the vindication of the one who has been treated unjustly. The vindication may be delayed. But darkness is not permanent, and noonday light is specific.
Commentary is from a charismatic Protestant perspective, drawing on KJV text and public-domain sources including Spurgeon, Andrew Murray, and Matthew Henry.