Isaiah 40:28-31
Have you not known?
Have you not heard?
The everlasting God, the Lord,
The Creator of the ends of the earth,
Neither faints nor is weary.
His understanding is unsearchable.
He gives power to the weak,
And to those who have no might He increases strength.
Even the youths shall faint and be weary,
And the young men shall utterly fall,
But those who wait on the Lord
Shall renew their strength;
They shall mount up with wings like eagles,
They shall run and not be weary,
They shall walk and not faint.
Hebrews 12:1-3
Therefore we also, since we are surrounded by so great a cloud of witnesses, let us lay aside every weight, and the sin which so easily ensnares us, and let us run with endurance the race that is set before us, looking unto Jesus, the author and finisher of our faith, who for the joy that was set before Him endured the cross, despising the shame, and has sat down at the right hand of the throne of God. For consider Him who endured such hostility from sinners against Himself, lest you become weary and discouraged in your souls.