Ephesians 3:16,
 "That he would grant you, according to the riches of his glory, to be strengthened with might by his Spirit in the inner man."

Isaiah 40:31,
"But they that wait upon the Lord shall renew their strength; they shall mount up with wings as eagles; they shall run, and not be weary; and they shall walk, and not faint."

2 Corinthians 12:9,
"And he said unto me, My grace is sufficient for thee: for my strength is made perfect in weakness. Most gladly therefore will I rather glory in my infirmities, that the power of Christ may rest upon me."

Romans 8:26,
"Likewise the Spirit also helpeth our infirmities: for we know not what we should pray for as we ought: but the Spirit itself maketh intercession for us with groanings which cannot be uttered."

Philippians 4:13,
"I can do all things through Christ which strengtheneth me."