John 3:16:

For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.

See also:

God’s Healing Provision Is Past Tense
Who You Are and What You Have
Even More Precious
How to Be Saved from Your Sins
Objection: We Cannot Demand Healing from God Because God Is Sovereign
Objection: David Said That It Was GOOD That He Was Afflicted; So It Can Be with Us
Objection: You Never Know What God Will Do