Atos 28

Atos 28:3

And so the viper, which drove its teeth into the apostle's hand, since it did not find any entry of sin in him, immediately released him and threw itself into the fire by inflicting on itself a punishment, because it had made an attack against an impenetrable body. Therefore let us fear the beasts, if we do not possess the full armor of virtue. — CATENA ON THE ACTS OF THE APOSTLES 28.3