Chrysostom (349-407): And a rule admits neither addition, nor subtraction, since that destroys its being a rule. NPNF1: Vol. XIII, Homilies on the Epistle of Paul to the Philippians, Homily XII, Comments on Philippians 3:16.
Greek text: Ὁ κανὼν οὔτε πρόσθεσιν, οὔτε ἀφαίρεσιν δέχεται, ἐπεὶ τὸ κανὼν εἶναι ἀπόλλυσι. In Epistolam Ad Philippenses Comentarius, Caput III, Homilia XII, PG 62:273.
DTK
Greek text: Ὁ κανὼν οὔτε πρόσθεσιν, οὔτε ἀφαίρεσιν δέχεται, ἐπεὶ τὸ κανὼν εἶναι ἀπόλλυσι. In Epistolam Ad Philippenses Comentarius, Caput III, Homilia XII, PG 62:273.
DTK