Those who wait on the Lord shall renew their strength.

Isaiah 40:29-31
²⁹ He gives strength to the weary
    and increases the power of the weak.
³⁰ Even youths grow tired and weary,
    and young men stumble and fall;
³¹ but those who hope in the Lord
    will renew their strength.
They will soar on wings like eagles;
    they will run and not grow weary,
    they will walk and not be faint.