2 Timothy 3:16-17:

All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness:
That the man of God may be perfect, thoroughly furnished unto all good works.

See also:

Job Explained
Deliverance Myths
Casting Out the Spirit of Stupidity
Should We Do Different “Things” to Necks, Spines, Arms, Pelvises and Legs Depending on the Condition?
Unforgiveness Is Itself a Forgiven Sin, So How Could It Hinder My Healing?
Must We Cast Out Demons “in the Name of Jesus Christ of Nazareth Who Came in the Flesh?”
Objection: Paul Told Timothy to Drink Wine Instead of Believing God for Healing
Objection: God Uses Sickness to Teach You Things
Objection: Sickness Can Be the Chastening of the Lord
Objection: Some Who Get Healed at Healing Crusades Don’t Keep Their Healings
Objection: Faith Preachers Are Trinity-Denying Heretics Because They Teach That Jesus Died Spiritually
Objection: God Uses Sickness to “Break” Us