20:39-47 The scribes commended the reply Christ made to the Sadducees about the resurrection, but they were silenced by a question concerning the Messiah. Christ, as God, was David's Lord; but Christ, as man, was David's son. The scribes would receive the severest judgement for defrauding the poor widows, and for their abuse of religion, particularly of prayer, which they used as a pretence for carrying on worldly and wicked plans. Dissembled piety is double sin. Then let us beg of God to keep us from pride, ambition, covetousness, and every evil thing; and to teach us to seek that honour which comes from him alone.See the notes at Matthew 22:41-46. Lu 20:41-47. Christ Baffles the Pharisees by a Question about David and Messiah, and Denounces the Scribes.

41. said, &c.—"What think ye of Christ [the promised and expected Messiah]? Whose son is He [to be]? They say unto Him, The son of David. He saith unto them, How then doth David in spirit [by the Holy Ghost, Mr 12:36] call Him Lord?" (Mt 22:42, 43). The difficulty can only be solved by the higher and lower—the divine and human natures of our Lord (Mt 1:23). Mark the testimony here given to the inspiration of the Old Testament (compare Lu 24:44).

See Poole on "Luke 20:42"

Until I make thine enemies thy footstool. Which words are a continuation of the citation out of the above Psalm Psa 110:1; and for the application of these words, with the preceding, to the Messiah; see Gill on Matthew 22:44. Till I make thine enemies thy footstool.