John Calvin Commentary Acts 13:40

"Beware therefore, lest that come upon [you] which is spoken in the prophets:" — Acts 13:40 (ASV)

Take heed that that come not upon you. Because he had to deal with stiff-necked men, or at least there were various people in the company who were stiff-necked (as if he meant to soften their stubbornness with a hammer), he added a rebuke to his teaching. For if the Jews had been obedient and willing to obey, undoubtedly he would have sought to sweetly allure them to Christ. But it was either their sluggishness or their willfulness that made him angrier. Just as all who despise the grace of Christ must be summoned before God’s judgment seat, so too must the horrible judgment of eternal death be proclaimed to them.

He signifies, indeed, that there is still opportunity for repentance when he urges them to take heed. Nevertheless, he also tells them that unless they beware in time, the horrible vengeance of God is not far off.

Which is said in the prophets. The passage cited is taken from the first chapter of Habakkuk (Habakkuk 1:5). But because all prophecies were gathered into one volume or body, Paul says that it is written in the prophets.