John Calvin on Ezekiel 13:8

Here at length he begins to pronounce judgment against the false prophets. Hitherto, under the form of a complaint, he shows how wickedly they had corrupted and profaned his sacred name: then how impiously they had rendered prophecies contemptible by their lies, and how cruel they were to the people whose safety ought to be their first care, and how they drew on the miserable to destruction. For after God has so narrated their sins, he now denounces punishment; and, first, generally he says that he was their adversary. This clause is by no means superfluous, since such carelessness would not have besotted the impious, unless they thought themselves free from all dealings with God; hence they utterly reject all fear and sin with freedom. But this could not happen, unless they determined that God either sleeps, or does not behold human affairs or trifles as they do. Since, therefore, false prophets very licentiously corrupt God’s word, when they pretend it to be a pleasant sport; God, on the other hand, pronounces Himself their adversary; as if he said, your contest shall not be with men, but I will be the avenger of so wicked a profanation of my name.