John Chrysostom
'And they bound themselves by an oath,' he says. Do you see how vengeful they are, and how stubborn in malice? What does 'they bound themselves by an oath' mean? It means, in other words, that they will abandon faith in God if they do not carry out their intention concerning Paul. Therefore they remained under the curse forever, because they did not kill Paul. See how they bound themselves by an oath as though by some necessity. Here fasting itself becomes the father of murder. As Herod bound himself by an oath as though by some necessity, so did they. Such is the devil's deceit: under the appearance of piety he lays snares. They ought to have come forward, made accusations, and convened a tribunal. This is not the work of priests, but of robbers; not of rulers, but of criminals. What madness! They senselessly subject themselves to a curse.