Adam Clarke on Ezekiel 20:26

I polluted them in their own gifts - I permitted them to pollute themselves by the offerings which they made to their idols. Causing their children to pass through the fire was one of those pollutions; but, did God ever give them a statute or judgment of this kind? No. He ever inveighs against such things, and they incur his heaviest displeasure and curse. See on Eze 20:31 (note).