2 Corinthians 12:9-10
"God is our refuge and strength, an ever-present help in trouble." Psalm 46:1
"He gives strength to the weary and increases the power of the weak. Even youths grow tired and weary, and young men stumble and fall; 31 but those who hope in the LORD will renew their strength. They will soar on wings like eagles; they will run and not grow weary, they will walk and not be faint."
"I can do everything through him who gives me strength." Philippians 4:13
"Finally, be strong in the Lord and in his mighty power." Ephesians 6:10