John Calvin on Jeremiah 19:12

As he had said before that the valley would be the place of slaughter, that thence it might take its name, so now he declares the same as to the city; “As then Tophet shall be the valley of slaughter, so shall Jerusalem be.” The ellipsis in the last clause is what often occurs in Hebrew; it may be supplied in our language by that, —

“Thus will I do to this place, saith Jehovah, and to its inhabitants, and that to make this city like Tophet.”

The full sentence is, “and thus will I do to make,” etc. — Ed. They were no doubt kindled into rage (as we shall see in the next chapter) on hearing this prophecy; but yet God purposed, however irreclaimable and refractory they were, to let them know what was approaching, and though they did not believe the words of the Prophet, God touched and even deeply wounded their consciences, so that before the event came they were miserable. For the same purpose he adds —

Jeremiah 19:13

13. And the houses of Jerusalem, and the houses of the kings of Judah, shall be defiled as the place of Tophet, because of all the houses upon whose roofs they have burned incense unto all the host of heaven, and have poured out drink offerings unto other gods.

13. Et erunt domus Hierusalem et domus regum Jehudah, sicut locus Thopheth immundae; ad omnes domos in quibus suffitum fecerunt super tecta eorum universae militiae coelorum, et libarunt libamen diis alienis.