Isaiah 40:28-30 New Revised Standard Version, Anglicised (NRSVA)
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;