Jeremiah 7:31-32

31They have built the high places of Topheth, which is in the Valley of Ben-hinnom (son of Hinnom), to burn their sons and their daughters in the fire [to honor Molech, the fire god]—which I did not command, nor did it come into My heart (mind).

32“Therefore, behold, the days are coming,” declares the Lord, “when it will no longer be called Topheth or the Valley of Ben-hinnom, but the Valley of the Slaughter, for [in bloody warfare] they will bury [the dead] in Topheth until there is no more room.