Canon 47
About the deposition of those bishops and priests who re-baptize the truly baptized, and who do not re-baptize those baptized by heretics.
If a bishop or presbyter again baptizes one who has true baptism, or if he does not baptize one who has been defiled by the wicked, let him be cast out as one who mocks the Cross and the death of the Lord and who does not distinguish between priests and false priests.
Greek original
Ἐπίσκοπος, ἢ πρεσβύτερος, τὸν κατὰ ἀλήθειαν ἔχοντα βάπτισμα ἐὰν ἄνωθεν βαπτίσῃ ἢ τὸν μεμολυσμένον παρὰ τῶν ἀσεβῶν ἐὰν μὴ βαπτίσῃ, καθαιρείσθω, ὡς γελῶν τὸν σταυρὸν καὶ τὸν τοῦ Κυρίου θάνατον, καὶ μὴ διακρίνων ἱερέας ψευδοϊερέων.
Parallel canons
Ап.464950IВс.819IIВс.7Трул.8495Лаод.32Карф.4872Вас.14791