2 Kings 23:10

And he defiled Topheth , which is in the Valley of the Son of Hinnom , that no one might burn his son or his daughter as an offering to Molech .

He desecrated Topheth, which was in the Valley of Ben Hinnom, so no one could use it to sacrifice their son or daughter in the fire to Molek.

And he defiled Topheth, which is in the valley of the children of Hinnom, that no man might make his son or his daughter to pass through the fire to Molech.