Jeremiah 19:5

5 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.

Jeremiah 19:5 Meaning and Commentary

Jeremiah 19:5

They have also built the high places of Baal
Or, they have even built 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 20:2-5 ) ; 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.

Jeremiah 19:5 In-Context

3 and hast said, Hear a word of Jehovah, ye kings of Judah, and inhabitants of Jerusalem, Thus said Jehovah of Hosts, God of Israel: `Lo, I am bringing in evil on this place, at which the ears of every one who is hearing it do tingle,
4 because that they have forsaken Me, and make known this place, and make perfume in it to other gods, that they knew not, they and their fathers, and the kings of Judah, and they have filled this place [with] innocent blood,
5 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.
6 `Therefore, lo, days are coming -- an affirmation of Jehovah -- and this place is not called any more, Tophet, and Valley of the son of Hinnom, but, Valley of slaughter.
7 And I have made void the counsel of Judah and Jerusalem in this place, and have caused them to fall by the sword before their enemies, and by the hand of those seeking their life, and I have given their carcase for food to the fowl of the heavens, and to the beast of the earth,
Young's Literal Translation is in the public domain.