Isaiah 40:28-31 AMP
Do you not know? Have you not heard?
The Everlasting God, the LORD, the Creator of the ends of the earth
Does not become tired or grow weary;
There is no searching of His understanding.
He gives strength to the weary,
And to him who has no might He increases power.
Even youths grow weary and tired,
And vigorous young men stumble badly,
But those who wait for the LORD [who expect, look for, and hope in Him]
Will gain new strength and renew their power;
They will lift up their wings [and rise up close to God] like eagles [rising toward the sun];
They will run and not become weary,
They will walk and not grow tired.