Sinodos: The Apostolic Canons 10

1And if one of the priests or a layman who have been expelled goes into a city just as if he had not been expelled, and he enters this city without permission [of the bishop] and is ordained, then let both he and the one who ordained him be expelled. For if he had been driven outside [of the congregation], let him be driven out a still greater length of days, for he has lied to the Church of God.