Isaiah 40:29-31

29 He gives strength to the weary,
And to the one who lacks might He increases power.
30 Though youths grow weary and tired,
And vigorous young men stumble badly,
31 Yet those who <sup data-fn="#fen-NASB-18452a" data-link="[a]”>[a]wait for the Lord
Will gain new strength;
They will <sup data-fn="#fen-NASB-18452b" data-link="[b]”>[b]mount up with wings like eagles,
They will run and not get tired,
They will walk and not become weary.