Правило 53
On the prohibition of marriages between recipients and parents of those adopted.
Kinship in spirit is greater than union in body, and we have learned about cases where some become the recipients of children from holy and saving baptism and after that enter into marital cohabitation with their mothers when they are widowed. Therefore, we determine: from now on, nothing like this will be done. If anyone, after this rule, is caught doing this, let him first of all leave this lawless marriage, and then let him be subjected to the penances of fornicators.
Greek original
Ἐπειδὴ μείζων ἡ κατὰ τὸ πνεῦμα οἰκειότης τῆς τῶν σωμάτων συναφείας, ἔγνωμεν δὲ ἔν τισι τόποις τινὰς ἐκ τοῦ ἁγίου καὶ σωτηριώδους βαπτίσματος παῖδας ἀναδεχομένους, καὶ μετὰ τοῦτο, ταῖς ἐκείνων μητράσι χηρευούσαις γαμικὸν συναλλάσσοντας συνοικέσιον, ὁρίζομεν, ἀπὸ τοῦ παρόντος μηδὲν τοιοῦτον πραχθῆναι. Εἰ δέ τινες μετὰ τὸν παρόντα κανόνα φωραθεῖεν τοῦτο ποιοῦντες, πρωτοτύπως μὲν οἱ τοιοῦτοι ἀφιστάσθωσαν τοῦ παρανόμου τούτου συνοικεσίου ἔπειτα δὲ καὶ τοῖς τῶν πορνευόντων ἐπιτιμίοις ὑποβληθήτωσαν.