Charles Ellicott Commentary Ezekiel 14:7

"For every one of the house of Israel, or of the strangers that sojourn in Israel, that separateth himself from me, and taketh his idols into his heart, and putteth the stumblingblock of his iniquity before his face, and cometh to the prophet to inquire for himself of me; I Jehovah will answer him by myself:" — Ezekiel 14:7 (ASV)

Or of the stranger. — Under the Mosaic legislation, “the stranger” living among the Israelites was bound to observe a certain outward deference to the law of the land, just as a foreigner in any country now is bound to respect in certain things the law of the country in which he lives. Israel being a theocracy, its fundamental law against idol-worship could not be violated with impunity by those who sought the protection of its government (Leviticus 17:10; Leviticus 20:1–2, and other similar passages).

In this case, however, outward idolatry is not alleged, as the accusations of this verse and Ezekiel 14:4 refer only to the secret idolatry of the heart; and the point insisted upon is not so much the idol-worship in itself, as the hypocrisy of attempting to join with this the inquiring of the Lord. God declares that He will answer such hypocrisy, in whomsoever it may be found, not by the prophet through whom the inquiry is made, but by Himself interposing to punish the inquirer, and to make him an example to deter others from a like course.