Isaiah 6:10:

Make the heart of this people fat, and make their ears heavy, and shut their eyes; lest they see with their eyes, and hear with their ears, and understand with their heart, and convert, and be healed.

See also:

Objection: Vine’s Expository Dictionary Says That 1 Peter 2:24 Is Figurative of Spiritual Healing
Objection: Matthew 13:15, John 12:39-41 and Acts 28:27 Prove That HEALED in 1 Peter 2:24 Doesn't Have to Mean Physically Healed