They have built also the high places of Baal, to burn their sons with fire for burnt offerings unto Baal, which I commanded not, nor spake it, neither came it into my mind:

And they have built the high places of Baalim, to burn their children with fire for a holocaust to Baalim: which I did not command, nor speak of, neither did it once come into my mind.

and have built the high places of Baal to burn their sons with fire, burnt-offerings to Baal, that I commanded not, nor spake of, nor did it come up on My heart.

And they have put up the high places of the Baal, burning their sons in the fire; a thing which was not ordered by me, and it was never in my mind:

And they have built the exalted places of Baal, in order to burn their children with fire as a holocaust to Baal, something that I did not instruct or speak of, nor did it enter into my heart.

Et extruxerunt excelsa (aedificarunt excelsa) ipsi Baal, ad comburendum filios suos igne in holocaustum ipsi Baal; quod non mandavi et non loquutus sum, et non ascendit super cor meum (vel, in cot meum.).

Offerings unto Baal - A general name for all the popular idols; Baal, Moloch, Ashtaroth, etc.

They have built also the high places of Baal, to burn their sons with fire [for] burnt offerings to Baal, which I (c) commanded not, nor spoke [it], neither came [it] into my mind:
(c) By which is declared that whatever is not commanded by God's word concerning is service is against his word.

They have also built the high places of Baal,.... Or, they have even built, &c. and so the words explain what is before suggested of their idolatry; these were the temples in which they placed his image, and the altars on which they sacrificed to him; as follows:
to burn their sons with fire, for burnt offerings unto Baal; the same idol that is sometimes called Moloch, the names being much of the same signification; the one signifying a "lord" or "master"; the other a king; and to the idol under each name they burned their children with fire, and offered them as burnt offerings unto it; which was a most cruel and barbarous way of sacrificing. Some think they only caused them to pass through two fires; but the text is express for it, that they burnt them with fire, and made burnt offerings of them, as they did with slain beasts. It seems very likely that they did both:
which I commanded not; in my law, as the Targum adds; and which was intimation enough to avoid it; though this was not all, he expressly forbad it, Leviticus 20:2;
nor spake it, neither came it into my mind; and it is marvellous it should ever enter into the heart of man; none but Satan himself could ever have devised such a way of worship.

commanded not--nay, more, I commanded the opposite (Leviticus 18:21; see Jeremiah 7:31-32).

To burn - This and the following verse, contain another great sin of this people, with the punishment which God proportions to it. The sin in the general was idolatry, but a most barbarous species of it, mentioned also Jeremiah 7:31, Jeremiah 32:35, where it is said, they made their sons and their daughters pass thro' the fire to Molech; the place where they did it is called Tophet, Jeremiah 19:6, of which also mention is made, Isaiah 30:33. Baal and Molech, signify the same thing; Baal signifies a Lord, Molech a King. Both Baal and Molech seem common names to all idols.