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.
Related Commentaries of Jeremiah 19:5
Jeremiah 19:5
5 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: