Charles Ellicott Commentary Ezekiel 16:20

"Moreover thou hast taken thy sons and thy daughters, whom thou hast borne unto me, and these hast thou sacrificed unto them to be devoured. Were thy whoredoms a small matter," — Ezekiel 16:20 (ASV)

Have sacrificed to them, i.e., have sacrificed the children to the idols. This was a terrible development of the later idolatries of Israel. At first, the custom appears to have been a ceremony of passing young children through the fire to thereby consecrate them to Moloch; but afterwards, it became an actual sacrifice of them in the fire to the idol.

The Lord speaks of them in Ezekiel 16:20 as “thy children whom thou hast borne unto Me;” they were indeed Israel’s children, but still children whom God had given to her. Then, in Ezekiel 16:21, by a most significant change of the pronoun, He calls them “My children,” the sin itself being aggravated by giving to the idol that which belonged to Jehovah.

The last clause of the verse would be better translated, Were thy whoredoms too little?—i.e., was not apostasy enough without adding to it this terrible and unnatural crime?