By a pillar - Rather, “upon the pillar” (see 2 Kings 11:14, note).
Made a covenant - “The covenant.” Josiah renewed the old covenant made between God and His people in Horeb Deuteronomy 5:2, so far at least as such renewal was possible by the mere act of an individual. He bound himself by a solemn promise to the faithful performance of the entire Law.
With all their heart - “Their” rather than “his,” because the king was considered as pledging the whole nation to obedience with himself. He and they “stood to it,” i. e., “accepted it, came into the covenant.”