Ezekiel 14:7-8

MLV(i) 7 For everyone of the house of Israel, or of the strangers who journey in Israel, that separates himself from me and takes his idols into his heart and puts the stumbling block of his iniquity before his face and comes to the prophet to inquire for himself of me, I Jehovah will answer him by myself. 8 And I will set my face against that man and will make him an astonishment, for a sign and a proverb. And I will cut him off from the midst of my people.
And you* will know that I am Jehovah.