Nicea II Seventh Ecumenical Council 787 a.d.
[W]e… press to our bosom with gladness the divine canons, holding fast all the precepts of the same, complete and without change, whether they have been set forth by the holy trumpets of the Spirit, the renowned Apostles, or by the Six Ecumenical Councils, or by Councils locally assembled for promulgating the decrees of the said Ecumenical Councils, or by our Holy Fathers. For all these, being illumined by the same Spirit, defined such things as were expedient. Accordingly those whom they placed under anathema, we likewise anathematize; those whom they deposed, we also depose; those whom they excommunicated, we also excommunicate; and those whom they delivered over to punishment, we subject to the same penalty. (Canon 1)
