Therefore, behold, the days come, saith the LORD, that it shall no more be called Tophet, nor the valley of the son of Hinnom, but the valley of slaughter: for they shall bury in Tophet, till there be no place.
Valley of slaughter - so named because of the great slaughter of the Jews about to take place at Jerusalem; a just retribution of their sin in slaying their children to Moloch in Tophet.
No place - no room, namely, to bury in, so many shall be those slain by the Chaldeans (Jeremiah 19:11; Ezekiel 6:5).