'Fidelity' in the Bible

Let your fountain (wife) be blessed [with the rewards of fidelity],And rejoice in the wife of your youth.

By mercy and lovingkindness and truth [not superficial ritual] wickedness is cleansed from the heart,And by the fear of the Lord one avoids evil.

“Because he who blesses himself on the earthWill bless himself by the God of truth and faithfulness;And he who swears [an oath] on the earthWill swear by the God of truth and faithfulness;Because the former troubles are forgotten,And because they are hidden from My sight.

We have given the hand [as a pledge of fidelity and submission] to Egypt and Assyria to get enough bread.

“Woe to you, [self-righteous] scribes and Pharisees, hypocrites! For you give a tenth (tithe) of your mint and dill and cumin [focusing on minor matters], and have neglected the weightier [more important moral and spiritual] provisions of the Law: justice and mercy and faithfulness; but these are the [primary] things you ought to have done without neglecting the others.

What then? If some did not believe or were unfaithful [to God], their lack of belief will not nullify and make invalid the faithfulness of God and His word, will it?

For I was greatly pleased when [some of the] brothers came [from time to time] and testified to your [faithfulness to the] truth [of the gospel message], that is, how you are walking in truth.

If anyone is destined for captivity, he will go into captivity; if anyone kills with a sword, he must be killed with a sword. Here is [the call for] the patient endurance and the faithfulness of the saints [which is seen in the response of God’s people to difficult times].