Malachi 2:7-9

For the priest’s lips should keep knowledge, and they should seek the law at his mouth; for he is the messenger of Jehovah of hosts. But ye are turned aside out of the way; ye have caused many to stumble in the law; ye have corrupted the covenant of Levi, saith Jehovah of hosts. Therefore have I also made you contemptible and base before all the people, according as ye have not kept my ways, but have had respect of persons in the law.