Правило 19
About the fact that those married to two sisters or a niece cannot be clergy.
One who married two sisters or a niece cannot be a cleric.
Greek original
Ὁ δύο ἀδελφὰς ἀγαγόμενος, ἢ ἀδελφιδῆν, οὐ δύναται εἶναι κληρικός.
Parallel canons
Трул.2654Неокес.2Вас.237887Феоф.5