Canon 65
About the fact that a cleric who prays with Jews or heretics is ejected, and a layman is excommunicated.
If any clergyman or layman comes to pray in a Jewish synagogue or heretical meeting, let him be deposed and excommunicated.
Greek original
Εἴ τις κληρικός, ἢ λαϊκός, εἰσέλθῃ εἰς συναγωγὴν Ἰουδαίων ἢ αἱρετικῶν προσεύξασθαι, καὶ καθαιρείσθω καὶ ἀφοριζέσθω.[1]
Parallel canons
Ап.7457071Трул.11Антиох.1Лаод.629333738