John Chrysostom

"And all the people were amazed, saying, Is not this the Son of David? But the Pharisees said, This fellow doth not cast out devils, but by Beelzebub, the prince of the devils." And yet what great thing had been said? Nevertheless, not even this did they endure: to such a degree, as I have already remarked, are they ever stung by the good works done to their neighbors, and nothing grieves them so much as the salvation of men. …

Homily on the Gospel of Matthew 40 ↗

Hilary of Poitiers

All the multitude were astonished at this which was done, but the jealousy of the Pharisees grew thereupon, And all the multitude were astonished and said, Is not this the Son of David?

Catena Aurea by Aquinas ↗

Thomas Aquinas

Then the effect of the miracle, namely, the amazement of the crowd: and all the people were amazed. Also their confession; hence they said, i.e., confessed, Can this be the son of David? It had been promised in the prophets that Christ would be born of the seed of David: "I will raise up for David a righteous branch" (Jer 23:5). But what was said above (11:25) seems fulfilled: "You have hid these things from the wise and prudent and revealed them to little ones." Hence the people acknowledge him.

Commentary on Matthew ↗

Rabanus Maurus

The multitude who seemed less learned, always wondered at the works of the Lord; they, on the other hand, either denied these things, or what they could not deny laboured to pervert by an ill interpretation, as though they were wrought not by a Deity, but by an unclean spirit, namely, Beelzebub, who was the God of Acharon: The Pharisees when they heard it said, This man does not cast out dæmons but by Beelzebub, the prince of the dæmons.

Catena Aurea by Aquinas ↗