Canon 64 of the Apostolic Canons: Prayer with Heretics
If any clergyman or layman shall enter into a synagogue of Jews or heretics to pray, let the former be deposed and let the latter be excommunicated.
+ Canon 64 of the Apostolic Canons
If any clergyman or layman shall enter into a synagogue of Jews or heretics to pray, let the former be deposed and let the latter be excommunicated.
+ Canon 64 of the Apostolic Canons
“Do not err, my brethren: if anyone follow a schismatic, he will not inherit the Kingdom of God. If any man walk about with strange doctrine, he cannot lie down with the passion. Take care, then, to use one Eucharist, so that whatever you do, you do according to God: for there is one Flesh of our Lord Jesus Christ, and one cup in the union of His Blood; one altar, as there is one bishop with the presbytery and my fellow servants, the deacons.”
— St. Ignatius Of Antioch, Epistle to the Philadelphians, 3:2-4:1, 110 A.D.