The Messiah would be Lord and King.
OT Prophecy NT Fulfillment
Psalm 110:1
"The LORD said unto my Lord, Sit thou at my right hand, until I make thine enemies thy footstool."
Matthew 22:41–45
[41] While the Pharisees were gathered together, Jesus asked them,
[42] Saying, What think ye of Christ? whose son is he? They say unto him, The Son of David.
[43] He saith unto them, How then doth David in spirit call him Lord, saying,
[44] The Lord said unto my Lord, Sit thou on my right hand, till I make thine enemies thy footstool?
[45] If David then call him Lord, how is he his son?
Tanakh – Ketuvim – Psalms 110:1
"A Psalm of David. HaShem saith unto my lord: 'Sit thou at My right hand, until I make thine enemies thy footstool.'"
Hebrew OT – Psalms 110:1
[110:1] נְאֻם יְהוָה לַאדֹנִי
שֵׁב לִימִינִי
עַד־אָשִׁית אֹיְבֶיךָ הֲדֹם לְרַגְלֶיךָ