'Fidelity' in the Bible
Let your fountain [of human life] be blessed [with the rewards of fidelity], and rejoice in the wife of your youth.
By mercy and love, truth and fidelity [to God and man -- "not by sacrificial offerings], iniquity is purged out of the heart, and by the reverent, worshipful fear of the Lord men depart from and avoid evil.
So [it shall be] that he who invokes a blessing on himself in the land shall do so by saying, May the God of truth and fidelity [the Amen] bless me; and he who takes an oath in the land shall swear by the God of truth and faithfulness to His promises [the Amen], because the former troubles are forgotten and because they are hidden from My eyes.
We have given the hand [as a pledge of fidelity and submission] to the Egyptians and to the Assyrians [merely] to get food to satisfy [our hunger].
Woe to you, scribes and Pharisees, pretenders (hypocrites)! For you give a tenth of your mint and dill and cummin, and have neglected and omitted the weightier (more important) matters of the Law -- "right and justice and mercy and fidelity. These you ought [particularly] to have done, without neglecting the others.
What if some did not believe and were without faith? Does their lack of faith and their faithlessness nullify and make ineffective and void the faithfulness of God and His fidelity [to His Word]?
In fact, I greatly rejoiced when [some of] the brethren from time to time arrived and spoke [so highly] of the sincerity and fidelity of your life, as indeed you do live in the Truth [the whole Gospel presents].
Whoever leads into captivity will himself go into captivity; if anyone slays with the sword, with the sword must he be slain. Herein is [the call for] the patience and the faith and fidelity of the saints (God's people).