Canon 12
That he who sacrificed to idols before baptism is innocent after baptism.
Those who made sacrifices before baptism, but were baptized after that, it was decided to elevate them to the degree of being washed.
Greek original
Τοὺς πρὸ τοῦ βαπτίσματος τεθυκότας, καὶ μετὰ ταῦτα βαπτισθέντας, ἔδοξεν εἰς τάξιν προάγεσθαι, ὡς ἀπολουσαμένους.
Parallel canons
IВс.14Неокес.5Кир.5