"Whatever I tell you in the dark, speak in the light; and what you hear in the ear, preach on the housetops.
Matthew 10:27
Surrounding context
10:26 Therefore do not fear them. For there is nothing covered that will not be revealed, and hidden that will not be known.
10:27 "Whatever I tell you in the dark, speak in the light; and what you hear in the ear, preach on the housetops.
10:28 And do not fear those who kill the body but cannot kill the soul. But rather fear Him who is able to destroy both soul and body in hell.