Canon LX.
Since
the Apostle exclaims that
he who cleaves to the Lord is one spirit, it is clear that he who is
intimate with his [i.e. the Lord’s] enemy becomes one by his
affinity with him. Therefore, those who pretend they are
possessed by a devil and by their depravity of manners feign to
manifest their form and appearance; it seems good by all means that
they should be punished and that they should be subjected to
afflictions and hardships of the same kind as those to which they who
are truly demoniacally possessed are justly subjected with the intent
of delivering them from the [work or rather] energy of the devil.
Notes.
Ancient Epitome of Canon LX.
Whoever shall pretend to be possessed by a devil, shall
endure the penance of demoniacs.
Zonaras says in his scholion that even in his day people
made the same claim to diabolical possession.