Isaiah 40
29 Ref He gives power to the feeble, increasing the strength of him who has no force.
30 Ref Even the young men will become feeble and tired, and the best of them will come to the end of his strength;
31 Ref But those who are waiting for the Lord will have new strength; they will get wings like eagles: running, they will not be tired, and walking, they will have no weariness.