Anathema in the Bible

who having come near to the chief priests and to the elders said, 'With an anathema we did anathematize ourselves -- to taste nothing till we have killed Paul;

But do not thou consent to them: for more than forty men of them are lying in wait for him, who have bound themselves under an anathema, neither to eat nor drink till they have killed him: and now they are in readiness, waiting only to procure the promise from thee.