'Revenge' in the Bible

For I have heard the defaming of many, terror on every side. Denounce, and we will denounce him, [say] all my familiar friends, those who watch for my fall; perhaps he will be persuaded, and we shall prevail against him, and we shall take our revenge on him.

Thus says the Lord Yahweh: Because the Philistines have dealt by revenge, and have taken vengeance with despite of soul to destroy with perpetual enmity;

Don't seek revenge yourselves, beloved, but give place to God's wrath. For it is written, "Vengeance belongs to me; I will repay, says the Lord."