New Defender's Study Bible Notes
30:33 Tophet. “Tophet” is another name for “the valley of the children of Hinnom” (II Kings 23:10), where the idolatrous Jews made their sons and daughters “to pass through the fire” as an offering to the pagan god Molech. King Josiah “defiled” it, by converting it into the constantly burning refuse dump for Jerusalem. The valley thus assumed the appearance of a lake of fire, and its resultant name (gehenna) became the name for the future hell, as used in the New Testament. Thus, this prophecy foreshadows the ultimate judgment of the lost in the eternal lake of fire (Revelation 20:10, 15).