Isaiah 8:18-20 American Standard Version (ASV)
18 Behold, I and the children whom Jehovah hath given me are for signs and for wonders in Israel from Jehovah of hosts, who dwelleth in mount Zion.
19 And when they shall say unto you, Seek unto them that have familiar spirits and unto the wizards, that chirp and that mutter: should not a people seek unto their God? on behalf of the living should they seek unto the dead? 20 To the [a]law and to the testimony! [b]if they speak not according to this word, surely there is no morning for them.