Isaiah 40:30

28Haven’t you known? Haven’t you heard? The everlasting God, the LORD, the Creator of the ends of the earth, doesn’t faint. He isn’t weary. His understanding is unsearchable.

29He gives power to the weak. He increases the strength of him who has no might.

30Even the youths faint and get weary, and the young men utterly fall;

31but those who wait for the LORD will renew their strength. They will mount up with wings like eagles. They will run, and not be weary. They will walk, and not faint.