Apost. Const. VIII. c. xiii: “Let the Bishop speak thus to the people: Holy things for holy persons. And let the people answer: There is One that is holy; there is one Lord, one Jesus Christ, blessed for ever, to the glory of God the Father.” The Liturgies of St. James and of Constantinople have nearly the same words: in the Liturgy of St. Mark the answer of the people is: One Father holy, one Son holy, one Spirit holy, in the unity of the Holy Spirit.