Isaiah 40
29 Ref He giveth power to the faint; and to him that hath no might he increaseth strength.
30 Ref Even the youths shall faint and be weary, and the young men shall utterly fall:
31 Ref but they that wait for Jehovah shall renew their strength; they shall mount up with wings as eagles; they shall run, and not be weary; they shall walk, and not faint.