Правило 81
Against the Armenians, who added the words “crucified for us” to the trisagion song.
We learned that in some places in the Trisagion Song, after the words “Immortal Holy One”, the following is exclaimed: “Crucified for us, have mercy on us,” and this was removed from this song by the ancient holy fathers as alien to piety, just as they rejected the lawless heretic who first introduced this exclamation. Therefore, we, too, while piously affirming what was laid down before us by the holy fathers, anathematize those who, after this definition, allow this exclamation to be pronounced in church or add something else to the Trisagion. And if the violator of these definitions is an initiate, we decide to deprive him of the title of initiate, and if he is a layman, to excommunicate him.
Greek original
Ἐπειδή περ ἔν τισι χώραις μεμαθήκαμεν, ἐν τῷ τρισαγίῳ ὕμνῳ, ἐν προσθήκης μέρει ἐκφωνεῖσθαι μετὰ τό, Ἅγιος ἀθάνατος, τό, Ὁ σταυρωθεὶς δι᾿ ἡμᾶς, ἐλέησον ἡμᾶς· τοῦτό τε ὑπὸ τῶν πάλαι ἁγίων Πατέρων, ὡς τῆς εὐσεβείας ἀλλότριον, ἐκ τοῦ τοιούτου ἀπηλάθη ὕμνου, σὺν τῷ τὴν τοιαύτην φωνὴν καινουργήσαντι παρανόμῳ αἱρετικῷ· καὶ ἡμεῖς κυροῦντες τὰ παρὰ τῶν ἁγίων Πατέρων ἡμῶν πρὶν εὐσεβῶς θεσμοθετηθέντα, ἀναθεματίζομεν τοὺς ἔτι μετὰ τὸν παρόντα ὅρον παραδεχομένους τὴν τοιαύτην φωνὴν ἐπ᾿ ἐκκλησίαις, ἢ ἄλλως πως τῷ τρισαγίῳ ὕμνῳ συνάπτοντας. Καὶ εἰ μὲν ἱερατικός ἐστιν ὁ παραβάτης τῶν ὁρισθέντων, ἀπογυμνοῦσθαι τοῦτον τῆς ἱερατικῆς ἀξίας προστάσσομεν· εἰ δὲ λαϊκός, ἢ μοναχός, ἀφορίζεσθαι.