Правило 83
The order to baptize every child for whom it is unknown whether he was previously baptized or not, of course, in the case when the child himself, due to his age, is not able to report whether he has been baptized, and there is no person who can attest to this.
It was convenient: whenever there are no reliable witnesses who claim that infants have undoubtedly been baptized, and because of their age they themselves are not able to properly give an answer about the sacrament given to them, they should be baptized without hindrance, so that the resulting bewilderment does not deprive them of such purification through sanctification.
Greek original
Ὁμοίως ἤρεσε περὶ τῶν νηπίων, ὁσάκις μὴ εὑρίσκονται βέβαιοι μάρτυρες, οἱ ταῦτα ἀναμφιβόλως βαπτισθέντα εἶναι λέγοντες, καὶ οὐδὲ αὐτὰ διὰ τὴν κεῖραν περὶ τῆς παραδοθείσης αὐτοῖς μυσταγωγίας ἀποκρίνεσθαι ἐπιτηδείως ἔχουσι, χωρίς τινος προσκόμματος ὀφείλειν ταῦτα βαπτίζεσθαι, μή ποτε ὁ τοιοῦτος δισταγμὸς ἀποστέρησῃ αὐτὰ τῆς τοιαύτης τοῦ ἁγιασμοῦ καθάρσεως· ἐκ τούτου γὰρ οἱ τοποτηρηταὶ τῶν Μαύρων ἀδελφοὶ ἡμῶν τοῦτο ἐβουλεύσαντο, ὅτι πολλοὺς τοιούτους ἀπὸ τῶν βαρβάρων ἐξαγοράζονται.[1]
Parallel canons
Ап.4950IIВс.7Трул.84VIIВс.8Карф.4548110Вас.191