2 Corinthians 4:13:
We having the same spirit of faith, according as it is written, I believed, and therefore have I spoken; we also believe, and therefore speak;
Notes on 2 Corinthians 4:13:
If you say, “I believe I’m healed but I don’t want to say anything to anyone until it manifests,” you’re lying. A person who REALLY believes that he has received his healing is willing to testify that he has that healing right now regardless of what things look like.
See also:
Speaking to Mountains, Trees and Diseases