Acts 23:20-21

20“The Jews,” he said, “have agreed to ask you to bring Paul down to the Sanhedrin tomorrow, as though they are going to hold a somewhat more careful inquiry about him.

21Don’t let them persuade you, because there are more than forty of them lying in ambush — men who have bound themselves under a curse not to eat or drink until they have killed him. Now they are ready, waiting for your consent.”