Isaiah 8:16-20

16Bind up the testimony, seal the law among my disciples. 17And I will wait upon the LORD, that hideth his face from the house of Jacob, and I will look for him. 18Behold, I and the children whom the LORD hath given me are for signs and for wonders in Israel from the LORD of hosts, who dwelleth in mount Zion. 19And when they shall say to you, Seek to them that are mediums, and to wizards that peep, and that mutter: should not a people seek to their God? for the living to the dead? 20To the law and to the testimony: if they speak not according to this word, it is because there is no light in them.1