Isaiah 40:28-31

28Dost thou not know, hast thou not heard, that the everlasting 1God, Jehovah, the Creator of the ends of the earth, fainteth not nor tireth? There is no searching of his understanding. 29He giveth power to the faint; and to him that hath no might he increaseth strength. 30Even the youths shall faint and shall tire, and the young men shall stumble and fall; 31but they that wait upon Jehovah shall renew [their] strength: they shall mount up with wings as eagles; they shall run, and not tire; they shall walk, and not faint.