Then the high priest - The high priest at this time was Ismael, the son of Fabi. He had been promoted to that office by Agrippa (Josephus, Antiq., book 20, chapter 8, section 8). It is probable, however, that the person here intended was Ananias, who had been high priest, and who would retain the name. See the notes on Acts 23:2. Some mss. read “high priests” here in the plural number, and this reading is approved by Mill and Griesbach. There is, however, no improbability in supposing that the high priest Ismael might have been also as much enraged against Paul as the others.
Informed him against Paul - Informed him of the accusation against him, and doubtless endeavored to prejudice the mind of Festus against him. They thus showed their unrelenting disposition. It might have been supposed that after two years this unjust prosecution would be abandoned and forgotten. But malice does not thus forget its object, and the spirit of persecution is not thus satisfied. It is evident that there was here every probability that injustice would be done to Paul, and that the mind of Festus would be biased against him. He was a stranger to Paul, and to the embittered feelings of the Jewish character. He would wish to conciliate their favor upon entering into the duties of his office. A strong representation, therefore, made by the chief men of the nation, would be likely to prejudice him violently against Paul, and to unfit him for the exercise of impartial justice.