Herodian, History of the Empire From the Death of Marcus…
“ But death awaits you this very day if you decide against us and refuse to join us, and we shall die ourselves, if need be, after we have killed you. We have done a deed which calls for even more desperate measures. The tyrant's procurator is dead, having paid the penalty for his savagery—death at our hands. If you join us and share our peril you will enjoy the honor of being emperor, and the deed which we have done will be praised, not punished. ”
