Paul apologized for unknowingly denouncing the high priest.

Acts 23:1-5

23 Paul looked straight at the Jewish council members and said: “My fellow Jews, all my life I have lived respecting our God, and I do not know of anything that I have done that I knew was wrong/evil.” 2 When Ananias the supreme priest heard what Paul said, he commanded the men who were standing near Paul to hit him on the mouth. 3 Then Paul said to Ananias, “God will punish you (sg) for that, you hypocrite [MET]! You sit there and judge me, using the laws that God gave Moses. But you yourself disobey those laws, because you commanded me to be struck {these men to strike me} without having proved that I have done anything that is wrong!” 4 The men who were standing near Paul rebuked him. They said, “Are not you (sg) afraid to insult God’s servant, our supreme priest?” 5 Paul replied, “My fellow Jews, I am sorry that I said that. I did not know that the man who told one of you to hit me is the high priest. If I had known that, I would not have insulted our supreme priest, because I know that it is written {that Moses wrote} in our Jewish law, ‘Do not speak evil of any of your rulers!’ ”