'Underworld' in the Bible

He passed his son through the fire and practiced divination and omen reading. He set up a ritual pit to conjure up underworld spirits, and appointed magicians to supervise it. He did a great amount of evil in the sight of the Lord, provoking him to anger.

So Saul died because he was unfaithful to the Lord and did not obey the Lord's instructions; he even tried to conjure up underworld spirits.

He passed his sons through the fire in the Valley of Ben-Hinnom and practiced divination, omen reading, and sorcery. He set up a ritual pit to conjure up underworld spirits and appointed magicians to supervise it. He did a great amount of evil in the sight of the Lord and angered him.

The underworld is naked before God; the place of destruction lies uncovered.

They will say to you, "Seek oracles at the pits used to conjure up underworld spirits, from the magicians who chirp and mutter incantations. Should people not seek oracles from their gods, by asking the dead about the destiny of the living?"

The Egyptians will panic, and I will confuse their strategy. They will seek guidance from the idols and from the spirits of the dead, from the pits used to conjure up underworld spirits, and from the magicians.

You will fall; while lying on the ground you will speak; from the dust where you lie, your words will be heard. Your voice will sound like a spirit speaking from the underworld; from the dust you will chirp as if muttering an incantation.