Isaiah 40:28-30

Revised Standard Version Catholic Edition

²⁸ Have you not known? Have you not heard?
The Lord is the everlasting God,
    the Creator of the ends of the earth.
He does not faint or grow weary,
    his understanding is unsearchable.
²⁹ He gives power to the faint,
    and to him who has no might he increases strength.
³⁰ Even youths shall faint and be weary,
    and young men shall fall exhausted;