Canon 59
That baptism must be strictly performed in the temple.
In a chapel inside a home, let no baptism be performed at all, but let those who intend to receive the most pure enlightenment come to Catholic churches and there be honored with this gift. If anyone is caught not keeping our definitions, if he is a cleric, he will be deposed, and if he is a layman, he will be excommunicated.
Greek original
Μηδαμῶς ἐν εὐκτηρίῳ οἴκῳ, ἔνδον οἰκίας τυγχάνοντι, βάπτισμα ἐπιτελείσθω· ἀλλ᾿ οἱ μέλλοντες ἀξιοῦοθαι τοῦ ἀχράντου φωτίσματος, ταῖς καθολικαῖς προσερχέσθωσαν ἐκκλησίαις, κἀκεῖσε τῆς δωρεᾶς ταύτης ἀπολαυέτωσαν. Εἰ δέ τις ἁλῷ τὰ παρ᾿ ἡμῶν ὁρισθέντα μὴ φυλάττων, εἰ μὲν κληρικὸς εἴη, καθαιρείσθω· εἰ δὲ λαϊκός, ἀφοριζέσθω.
Parallel canons
Ап.31IVВс.18Трул.3134VIIВс.10Гангр.6Антиох.6Лаод.58Карф.10Двукр.12