Ezekiel 33:31-33

So they come to you in crowds as if they were really ready to listen. They sit in front of you as if they were my people and hear your words, but they will not obey them. With their mouths they tell me they love me, but their hearts desire their selfish profits. To your people you are nothing more than a singer who sings love songs and has a beautiful voice and plays a musical instrument well. They hear your words, but they will not obey them. “When this comes true, and it surely will happen, then the people will know that a prophet has been among them.”