Acts 23:18 (KJV)

And when Paul’s sister’s son heard of their lying in wait, he went and entered into the castle, and told Paul.

Then Paul called one of the centurions unto him, and said, Bring this young man unto the chief captain: for he hath a certain thing to tell him.

So he took him, and brought him to the chief captain, and said, Paul the prisoner called me unto him, and prayed me to bring this young man unto thee, who hath something to say unto thee.

Then the chief captain took him by the hand, and went with him aside privately, and asked him, What is that thou hast to tell me?

And he said, The Jews have agreed to desire thee that thou wouldest bring down Paul to morrow into the council, as though they would enquire somewhat of him more perfectly.