John Gill Commentary Ezekiel 23:37

"For they have committed adultery, and blood is in their hands; and with their idols have they committed adultery; and they have also caused their sons, whom they bare unto me, to pass through [the fire] unto them to be devoured." — Ezekiel 23:37 (ASV)

That they have committed adultery Either literally, adultery with their neighbours' wives, which was a prevailing sin with this people; or figuratively, spiritual adultery, that is, idolatry: and blood is in their hands ; the Targum is, ``they have shed the blood of innocents with their hands;'' the blood of prophets and righteous men, sent unto them; and the blood of their infants in sacrificing to idols, as after mentioned:

and with their idols have they committed adultery ; by worshipping them, which is spiritual adultery; and this being so explicitly mentioned, it seems to be distinguished from corporeal adultery in the first clause, which may be only there designed; and so Kimchi thinks:

and have also caused their sons, whom they bore to me, to pass for them through the fire, to devour them ; their children, who were the Lord's by national adoption, and who ought to have been trained up in the worship and service of God, were, in a most barbarous and unnatural manner, caused to pass through the fire, for or to the idols Molech and Baal; and that not merely by way of lustration and dedication, which was sometimes done by passing between two fires, but so as to be devoured and destroyed by the fire.