That's strike 2 on modalism!! Jesus' Baptism, where ALL 3 persons were Present simultaneously was strike 1, and now David acknowledging that HIS Lord is a SEPARATE Person from God the Father:
Psalm 110:1 New King James Version (NKJV)
Announcement of the Messiah’s Reign
A Psalm of David.
110 The Lord said to my Lord,
“Sit at My right hand,
Here is an explanation of the words "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). 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.
The clause
the LORD says to my Lord contains two different Hebrew words for “lord” in the original. The first word is
Yahweh, the Hebrew covenant name for God. 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 “Lord” in “the LORD says to my Lord” is the eternal God of the universe, the Great I AM who revealed Himself to Moses in
Exodus 3. This self-existent, omnipotent God speaks in
Psalm 110 to someone else who is also David’s “Lord.”
The second “Lord” in “the LORD says to my Lord” is the Messiah, or the Christ.
Ya got 1 more strike with a thread to try before YOU'RE OUT!