Joshua 15:8

8Then the boundary goes up by athe Valley of the Son of Hinnom at the southern shoulder of the Jebusite ( bthat is, Jerusalem). And the boundary goes up to the top of the mountain that lies over against the Valley of Hinnom, on the west, at the northern end of the Valley cof Rephaim.

2 Kings 23:10

10And he defiled dTopheth, which is ein the Valley of the Son of Hinnom, fthat no one might burn his son or his daughter as an offering to gMolech.
Hebrew might cause his son or daughter to pass through the fire for Molech

Jeremiah 7:31

31And they have built the high places of iTopheth, which is in jthe Valley of the Son of Hinnom, kto burn their sons and their daughters in the fire, lwhich I did not command, nor did it come into my mind.
Copyright information for ESV