Speaking by the Holy Spirit, David himself declared: ‘The Lord said to my Lord, “Sit at My right hand until I put Your enemies under Your feet.”’
Here, I. Christ shows the people how weak and defective the scribes were in their preaching, and how unable to solve the difficulties that occurred in the scriptures of the Old Testament, which they undertook to expound. Of this he gives an instance, which is not so fully related here as it was in Matthew.
Commenting on Mark 12:35-40
And he said unto them in his doctrine,.... As he was preaching, not to the Scribes and Pharisees but to the multitude, and to his disciples particularly; and to them in the audience of the people, as appears from Mat 23:1.
For David himself said by the Holy Ghost, The LORD said to my Lord, Sit thou on my right hand, till I make thine enemies thy footstool. (f) Literally, "in the Holy Spirit"; and there is a great power in this kind of speech, by which is meant that it was not so much David who was speaking, but instead the Holy Spirit, who in a way possessed David.