Synodical letter from the council at Constantinople
“Now as to the particular administration of individual churches, an ancient custom, as you know, has obtained, confirmed by the enactment of the holy fathers at Nicæa, that, in every province, the bishops of the province, and, with their consent, the neighbouring bishops with them, should perform ordinations as expediency may require. In conforming with these customs note that other churches have been administered by us and the priests of the most famous churches publicly appointed. Accordingly over the new made (if the expression be allowable) church at Constantinople, which, as though from a lion's mouth, we have lately snatched by God's mercy from the blasphemy of the heretics, we have ordained bishop the right reverend and most religious Nectarius, in the presence of the œcumenical council, with common consent, before the most religious emperor Theodosius, and with the assent of all the clergy and of the whole city. And over the most ancient and truly apostolic church in Syria, where first the noble name of Christians was given them, the bishops of the province and of the eastern diocese have met together and canonically ordained bishop the right reverend and most religious Flavianus, with the consent of all the church, who as though with one voice joined in expressing their respect for him. This rightful ordination also received the sanction of the general council. Of the church at Jerusalem, mother of all the churches, we make known that the right reverend and most religious Cyril is bishop, who was some time ago canonically ordained by the bishops of the province, and has in several places fought a good fight against the Arians. We beseech your reverence to rejoice at what has thus been rightly and canonically settled by us, by the intervention of spiritual love and by the influence of the fear of the Lord, compelling the feelings of men, and making the edification of churches of more importance than individual grace or favour. Thus since among us there is agreement in the faith and Christian charity has been established, we shall cease to use the phrase condemned by the apostles, 'I am of Paul and I of Apollos and I of Cephas,' and all appearing as Christ's, who in us is not divided, by God's grace we will keep the body of the church unrent, and will boldly stand at the judgment seat of the Lord.”
These things they wrote against the madness of Arius, Aetius, and Eunomius; and moreover against Sabellius, Photinus, Marcellus, Paul of Samosata, and Macedonius. Similarly they openly condemned the innovation of Apollinarius in the phrase, “And we preserve the doctrine of the incarnation of the Lord, holding the tradition that the dispensation of the flesh is neither soulless, nor mindless, nor imperfect.”
Source: Ecclesiastical History (New Advent)