Leviticus 20:6

If any of you go for advice to people who consult the spirits of the dead, I will turn against you and will no longer consider you one of my people.

Leviticus 19:31

Do not turn to psychics or mediums to get help. That will make you unclean. I am Jehovah your God.

Leviticus 20:27

If you claim to receive messages from the dead, you will be put to death by stoning, just as you deserve.

Isaiah 8:19

People will say to you: Ask for help from the mediums and the fortunetellers, who whisper and mutter. Should people ask their God for help instead? Why should they ask the dead to help the living?

Exodus 34:15-16

Otherwise you might make a covenant with the inhabitants of the land. They would commit spiritual immorality (fornication) with their gods and sacrifice to their gods. Someone might invite you to eat of his sacrifice.

Leviticus 19:26

Do not eat any meat with blood still in it. Never cast evil spells, and never consult fortunetellers.

Numbers 15:39

When you look at the threads in the tassel, you will remember all Jehovah's commandments and obey them. Then you will not do whatever you want and go after whatever you see, as if you were chasing after prostitutes.

Deuteronomy 18:10-14

Do not sacrifice your children in the fires on your altars. Do not let your people practice divination or look for omens or use spells or charms.

1 Chronicles 10:13-14

Saul died because of his unfaithfulness to Jehovah. He did not obey the word of Jehovah (YHWH). He asked a medium to request information from a dead person.

Psalm 73:27

Those who are far from you will perish. You have destroyed all those who are unfaithful to you.

Ezekiel 6:9

Then those who escape will remember me among the nations where they are taken captive. I was hurt by their adulterous hearts, which turned away from me, and by their eyes, which lusted after idols. They will hate themselves for the evil and disgusting things that they have done.

Hosea 4:12

My people ask counsel at their stock, and their staff declares to them; for the spirit of adultery caused them to go astray. They have played the harlot, departing from their God.

Treasury of Scripture Knowledge

Summary

And the soul that turneth after such as have familiar spirits, and after wizards, to go a whoring after them, I will even set my face against that soul, and will cut him off from among his people.

Bible References

Familiar

Leviticus 20:27
If you claim to receive messages from the dead, you will be put to death by stoning, just as you deserve.
Leviticus 19:26
Do not eat any meat with blood still in it. Never cast evil spells, and never consult fortunetellers.
Deuteronomy 18:10
Do not sacrifice your children in the fires on your altars. Do not let your people practice divination or look for omens or use spells or charms.
Isaiah 8:19
People will say to you: Ask for help from the mediums and the fortunetellers, who whisper and mutter. Should people ask their God for help instead? Why should they ask the dead to help the living?

Go

Exodus 34:15
Otherwise you might make a covenant with the inhabitants of the land. They would commit spiritual immorality (fornication) with their gods and sacrifice to their gods. Someone might invite you to eat of his sacrifice.
Numbers 15:39
When you look at the threads in the tassel, you will remember all Jehovah's commandments and obey them. Then you will not do whatever you want and go after whatever you see, as if you were chasing after prostitutes.
Psalm 73:27
Those who are far from you will perish. You have destroyed all those who are unfaithful to you.
Ezekiel 6:9
Then those who escape will remember me among the nations where they are taken captive. I was hurt by their adulterous hearts, which turned away from me, and by their eyes, which lusted after idols. They will hate themselves for the evil and disgusting things that they have done.
Hosea 4:12
My people ask counsel at their stock, and their staff declares to them; for the spirit of adultery caused them to go astray. They have played the harlot, departing from their God.

General references

Exodus 22:18
Never allow a witch to live.
Leviticus 18:29
Whoever does any of these disgusting things must be excluded from the people.
Leviticus 19:31
Do not turn to psychics or mediums to get help. That will make you unclean. I am Jehovah your God.
Leviticus 23:30
I will destroy those who do any work on that day.