John Chrysostom

"If David then call Him Lord, how is He then his Son," not taking away the fact that He is his Son, away with the thought; for He would not then have reproved Peter for this, but to correct their secret thoughts. So that when He saith, "How is He his Son?" He meaneth this, not so as ye say. For they said, that He is Son only, and not also Lord. …

Homily on the Gospel of Matthew 71 ↗

Augustine of Hippo

Here then there is need for caution, lest Christ himself be thought to have denied that he was the Son of David. He did not deny that he was the Son of David, but he probed his detractors on the particular way this can be. You have said that Christ is the Son of David. I do not deny it. But "if David thus calls him Lord, how is he his Son?" Tell me how he could be his son who is also his Lord? They did not answer him but were dumbfounded.Let us then answer them by the explanation given by Christ himself. Where given? …

Sermon 92.2-3 ↗

Thomas Aquinas

If David then call him Lord, how is he his son? Therefore he is both Lord and son, because he is son according to the flesh, since he drew his origin from him, and Lord according to his divinity.

Commentary on Matthew ↗

Glossa Ordinaria

He concludes from this authority, If David then call Him Lord, how is He his son?

Catena Aurea by Aquinas ↗