'Unfailing' in the Bible
The king said, Is there not still someone of the house of Saul to whom I may show the [unfailing, unsought, unlimited] mercy and kindness of God? Ziba replied, Jonathan has yet a son who is lame in his feet.
Surely or only goodness, mercy, and unfailing love shall follow me all the days of my life, and through the length of my days the house of the Lord [and His presence] shall be my dwelling place.
Sell what you possess and give donations to the poor; provide yourselves with purses and handbags that do not grow old, an unfailing and inexhaustible treasure in the heavens, where no thief comes near and no moth destroys.
This is in keeping with my own eager desire and persistent expectation and hope, that I shall not disgrace myself nor be put to shame in anything; but that with the utmost freedom of speech and unfailing courage, now as always heretofore, Christ (the Messiah) will be magnified and get glory and praise in this body of mine and be boldly exalted in my person, whether through (by) life or through (by) death.
Above all things have intense and unfailing love for one another, for love covers a multitude of sins [forgives and disregards the offenses of others].