6 The faithful of the Eastern rite not only count St. Cyril among the 'ecumenical Fathers,' but also honor him with the deepest veneration in their liturgical prayers. Thus the Greeks chant in the Menaia of the 9th June: Enlightened in mind by the flames of the Holy Spirit, thou hast uttered oracles even as the sun sends forth its rays. To the ends of the earth and to all the faithful thy teaching has gone forth, O most blessed Saint, illuminating all sorts and conditions of men, and dispelling darkness of heresy by the power and strength of that Light who was born of the Virgin.
Source: Orientalis Ecclesiae (Vatican.va)