The Bible has a great deal to say about revenge. Both the Hebrew and Greek words translated “vengeance,” “revenge,” and “avenge” have as their root meaning the idea of punishment. This is crucial in understanding why God reserves for Himself the right to avenge.

Vengeance is mine, and recompense,
for the time when their foot shall slip;
for the day of their calamity is at hand,
and their doom comes swiftly.’
Deuteronomy 32/35

Beloved, never avenge yourselves, but leave it to the wrath of God, for it is written,
“Vengeance is mine, I will repay, says the Lord.”
Romans 12:19