The second is adoni, meaning “lord” or “master.” So, in Psalm 110:1, David writes this: “Yahweh says to my Adoni.” To better understand Jesus’ use of Psalm 110:1, we’ll look at the identity of each “Lord” separately. The first word is Yahweh, the Hebrew covenant name for God. The clause the LORD says to my Lord contains two different Hebrew words for “lord” in the original. In Matthew 22:44, Jesus quotes this verse in a discussion with the Pharisees in order to prove that the Messiah is more than David’s son He is David’s Lord. In Psalm 110:1, David says, “The LORD says to my Lord: ‘Sit at my right hand, until I make your enemies your footstool’” (ESV).
