Malachi 2:6-9

The law of truth was in his mouth, and unrighteousness was not found in his lips: he walked with me in peace and uprightness, and turned many away from iniquity. 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.