Isaiah 40:29–31
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;
31 but lthey who wait for the Lord shall renew their strength;
they shall mount up with wings mlike eagles;
they shall run and not be weary;
they shall walk and not faint.
Philippians 4:13
13 I can do all things dthrough him who strengthens me.