“He saith unto them, How then doth David in spirit call him Lord, saying,”
King James Version (KJV)
22:43 How doth David then by the Spirit - By inspiration, call him Lord? If he be merely the son (or descendant) of David? If he be, as you suppose, a mere man, the son of a man?
Mt 22:43 Call him Lord. David then, by inspiration, calls his own Son his Lord, which shows that he is more than David's Son.