" Similar evidence is found in Malachi, when the Lord says, “The Lord whom you seek will suddenly come to his temple; the messenger of the covenant in whom you delight, behold, he is coming, says the LORD of hosts. But who can endure the day of his coming, and who can stand when he appears?” (Mal. 3:1–2). Here again the one speaking (“the LORD of hosts”) distinguishes himself from “the Lord whom you seek,” suggesting two separate persons, both of whom can be called “Lord. "

― Wayne Grudem , Systematic Theology: An Introduction to Biblical Doctrine