Acts 23:20-21

20And he said, The Jews have agreed to ask thee to bring down Paul tomorrow unto the council, as though thou wouldest inquire somewhat more exactly concerning him.

21Do not thou therefore yield unto them: for there lie in wait for him of them more than forty men, which have bound themselves under a curse, neither to eat nor to drink till they have slain him: and now are they ready, looking for the promise from thee.