Acts 23:16-22

But the son of Paul’s sister heard of their [planned] ambush, and he went to the barracks and told Paul. Then Paul, calling in one of the centurions, said, “Take this young man to the commander, for he has something to tell him.” So he took him and led him to the commander and said, “Paul the prisoner called for me and asked me to bring this young man to you, because he has something to tell you.” The commander took him by the hand and stepping aside, began to ask him privately, “What is it that you have to tell me?” And he said, “The Jews have agreed to ask you to bring Paul down to the Council (Sanhedrin, Jewish High Court) tomorrow, as if they were going to interrogate him more thoroughly. But do not listen to them, for more than forty of them are lying in wait for him, and they have bound themselves with an oath not to eat or drink until they have killed him. Even now they are ready, just waiting for your promise.” So the commander let the young man leave, instructing him, “Do not tell anyone that you have given me this information.”