Isaiah 40:28-30

New 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 strengthens the powerless.
³⁰ Even youths will faint and be weary,
    and the young will fall exhausted;