'Hinnom Valley' in the Bible
From there the boundary proceeded to the border of the mountain that overlooks the Ben-hinnom Valley at the northern end of the Rephaim Valley, where it proceeded down the Hinnom Valley south of the slope of the Jebusites toward En-rogel.
He also defiled Topheth, which is located in the Ben-hinnom Valley, so that no one would force his son or daughter to pass through the fire in dedication to Molech.
burned incense in the Ben-hinnom Valley, and burned his sons as an offering, following the detestable activities of the nations whom the LORD had expelled in front of the people of Israel.
He burned his sons as an offering in the Ben-hinnom Valley, practiced fortune-telling, witchcraft, sorcery, and communicated with mediums and separatists. He did a lot of things that the LORD considered to be evil, thus provoking him.
Zanoah, Adullam, and their villages, Lachish and its fields, and Azekah and its towns. So they camped from Beersheba as far as the Hinnom Valley.
Go out to the part of the Hinnom Valley which is near the entrance of the Potsherd Gate. Announce there what I tell you.
So I, the Lord, say: "The time will soon come that people will no longer call this place Topheth or the Hinnom Valley. But they will call this valley the Valley of Slaughter!
They built the high places of Baal that are in the Hinnom Valley in order to sacrifice their sons and daughters to Molech something that I didn't command, nor did it ever enter my mind for them to require this utterly repugnant thing and lead Judah into sin."
Hinnom Valleynot in New American Standard Bible