So when they did not agree among themselves, they departed after Paul had said one word: “The Holy Spirit spoke rightly through Isaiah the prophet to our fathers, 26 saying,
‘Go to this people and say:
“Hearing you will hear, and shall not understand;
And seeing you will see, and not perceive;
27 For the hearts of this people have grown dull.
Their ears are hard of hearing,
And their eyes they have closed,
Lest they should see with their eyes and hear with their ears,
Lest they should understand with their hearts and turn,
So that I should heal them.”’
28 “Therefore let it be known to you that the salvation of God has been sent to the Gentiles, and they will hear it!” 29 And when he had said these words, the Jews departed and had a great dispute among themselves. — Acts 28:25-29.
To those who do not believe, Paul tells them that they are hardened in their sin as Isaiah prophesied. He will pursue his policy of concentrating on taking the gospel to the Gentiles. The departing Jews dispute much between themselves.