Leviticus 20:26-27

Young's Literal Translation

²⁶ and ye have been holy to Me; for holy [am] I, Jehovah; and I separate you from the peoples to become Mine.

²⁷ `And a man or woman -- when there is in them a familiar spirit, or who [are] wizards -- are certainly put to death; with stones they stone them; their blood [is] on them.'