8 Christ suffered once for men; he will suffer again for the demons.
The Origenists have tried to coerce me; they have even stirred up the heathen by denouncing the destruction of the Serapeum; and have sought to withdraw from the ecclesiastical jurisdiction two persons accused of grave crimes. One of these is the woman who was wrongly placed on the list of widows by Isidore, the other Isidore himself. He is the standard-bearer of the heretical faction, and his wealth supplies them with unbounded resources for their violent enterprises. They have tried to murder me; they seized the monastery church at Nitria, and for a time prevented the bishops from entering and the offices from being performed. Now, like Zebul (Beelzebub) they go to and fro on the earth.
I have done them no harm; I have even protected them. But I would not let an old friendship (with Isidore) impair our faith and discipline. I implore you to oppose them wherever they come, and to prevent them from unsettling the brethren committed to you.
Source: Letters (New Advent)