'Revenge' in the Bible

For I have heard the defaming of many, terror on every side: Report, and we will report it. All my familiars are watching for my stumbling: Peradventure he will be enticed, and we shall prevail against him; and we shall take our revenge on him.

Thus saith the Lord Jehovah: Because the Philistines have dealt by revenge, and have taken vengeance with despite of soul, to destroy, from old hatred;