Valleys: Hinnom or Tophet

Then it went down to the foot of the hill that faces the Valley of Ben-hinnom at the northern end of the Valley of Rephaim and ran down the Valley of Hinnom toward the southern slope of the Jebusites and downward to En-rogel.

He also desecrated Topheth in the Valley of Ben-hinnom so that no one could sacrifice his son or daughter in the fire to Molech.

Moreover, Ahaz burned incense in the Valley of Ben-hinnom and sacrificed his sons in the fire, according to the abominations of the nations that the LORD had driven out before the Israelites.

So behold, the days are coming, declares the LORD, when this place will no longer be called Topheth and the Valley of Ben-hinnom, but the Valley of Slaughter. For they will bury the dead in Topheth until there is no more room.