Isaiah 40:29-31 NIV

29 He gives strength to the weary and increases the power of the weak.

References for Isaiah 40:29

30 Even youths grow tired and weary, and young men stumble and fall;

References for Isaiah 40:30

31 but those who hope in the LORDwill renew their strength. They will soar on wings like eagles; they will run and not grow weary, they will walk and not be faint.

References for Isaiah 40:31