Mark 12:36
Speaking by the Holy Spirit, David himself declared:
What it says
Jesus cites David speaking by the Holy Spirit in the psalm.
What it is doing
The verse grounds the argument in inspired Scripture.
In context
35While Jesus was teaching in the temple courts, He asked, “How can the scribes say that the Christ is the Son of David? 36Speaking by the Holy Spirit, David himself declared: 37David himself calls Him ‘Lord.’ So how can He be David’s son?”