Isaiah 40:28-31

28Hast thou not known? hast thou not heard, that the everlasting God, Yhwh, the Creator of the ends of the earth, fainteth not, neither is weary? there is no searching of his understanding. 29He giveth power to the faint; and to them that have no might he increaseth strength. 30Even the youths shall faint and be weary, and the young men shall utterly fall: 31But they that wait upon Yhwh shall renew their strength; they shall mount up with wings as eagles; they shall run, and not be weary; and they shall walk, and not faint.1