Canon 66
About the killer cleric erupting; the layman is absent.
If any cleric hits someone in a fight and kills with one blow, let him be ejected for his vehemence. If he is a layman, let him be excommunicated.
Greek original
Εἴ τις κληρικός, ἐν μάχῃ τινὰ κρούσας, καὶ ἀπὸ τοῦ ἑνὸς κρούσματος ἀποκτείνῃ, καθαιρείσθω διὰ τὴν προπέτειαν αὐτοῦ· ἐὰν δὲ λαϊκὸς ᾖ, ἀφοριζέσθω.[1]
Parallel canons
Ап.27Двукр.9Анкир.2223Вас.854555657Григ.Нисск.5