Canon 61
There is a parable for fornicators and adulterers about the impossibility of joining the team.
If a faithful person is accused of fornication, adultery, or another forbidden act and is exposed, he should not be admitted to the clergy.
Greek original
Εἴ τις κατηγορία γένηται κατὰ πιστοῦ, πορνείας ἢ μοιχείας ἢ ἄλλης τινὸς ἀπηγορευμένης πράξεως, καὶ ἐλεγχθείη, εἰς κλῆρον μὴ προαγέσθω.
Parallel canons
Ап.25IВс.210IIВс.6Трул.33Анкир.12Неокес.112Карф.128129130Вас.89Григ.Нисск.5Феоф.3