John Chrysostom

Do you mark Paul's wisdom? He not only gained admiration at the time, but put into them a longing desire for a second hearing, while in what he said he dropped some seeds as it were, and forbore to solve the questions raised, or to follow out the subject to its conclusion, his plan being to interest them and engage their good-will to himself, and not make people listless and indifferent by casting all at once into the minds of those who first heard him. …

Homily on Acts 30 ↗

Theophylact of Ohrid

You saw the wise resourcefulness of Paul. In order to attach and endear the Gentiles to himself, and also so as not to scatter their attention by communicating everything to them all at once, he first offered several hints and did not resolve them, and by this aroused in the Gentiles a desire to hear him another time. He said that the forgiveness of sins was being proclaimed, but how this forgiveness would be accomplished, he did not explain. He did not baptize them immediately, because it was untimely.

Commentary on Acts ↗

Cassiodorus

"And as they went out, they desired them, that on the next sabbath, they would speak unto them the words of God." As Paul and Barnabas went out of the synagogue, a crowd of Jews begged them to speak their words about the Lord Christ again on the following sabbath. On the next sabbath, as the people had very eagerly come together to hear them, some of the Jews, moved with great envy, tried to contradict them. …

Complexiones on the Acts of the Apostles ↗