Ezekiel 33:31-33

31So they come to you as people do, they sit before you as My people, and they hear your words, but they do not do them; for with their mouth they show much love, but their hearts pursue their own gain.

32Indeed you are to them as a very lovely song of one who has a pleasant voice and can play well on an instrument; for they hear your words, but they do not do them.

33And when this comes to pass—surely it will come—then they will know that a prophet has been among them.”