You must not allow a sorceress to live.

Leviticus 19:31
You must not turn to mediums or spiritists; do not seek them out, or you will be defiled by them. I am the LORD your God.

Leviticus 20:6
Whoever turns to mediums or spiritists to prostitute himself with them, I will also set My face against that person and cut him off from his people.

Leviticus 20:27
A man or a woman who is a medium or spiritist must surely be put to death. They shall be stoned; their blood is upon them.'"

Deuteronomy 18:10
Let no one be found among you who sacrifices his son or daughter in the fire, practices divination or conjury, interprets omens, practices sorcery,

Deuteronomy 18:11
casts spells, consults a medium or spiritist, or inquires of the dead.

1 Samuel 28:3
Now by this time Samuel had died, and all Israel had mourned for him and buried him in Ramah, his own city. And Saul had removed the mediums and spiritists from the land.

Jeremiah 27:9
But as for you, do not listen to your prophets, your diviners, your interpreters of dreams, your mediums, or your sorcerers who declare, 'You will not serve the king of Babylon.'

Jeremiah 27:10
For they prophesy to you a lie that will serve to remove you from your land; I will banish you and you will perish.

You shall not suffer a witch to live.