Clement of Alexandria
“A multitude of other pieces of advice to particular persons is written in the holy books: some for presbyters, some for bishops and deacons; and others for widows, of whom we shall have opportunity to speak elsewhere” (The Instructor of Children 3:12:97:2 [A.D. 191]).
“Even here in the Church the gradations of bishops, presbyters, and deacons happen to be imitations, in my opinion, of the angelic glory and of that arrangement which, the scriptures say, awaits those who have followed in the footsteps of the apostles and who have lived in complete righteousness according to the gospel” (Miscellanies 6:13:107:2 [A.D. 208]).
Hippolytus
"When a deacon is to be ordained, he is chosen after the fashion of those things said above, the bishop alone in like manner imposing his hands upon him as we have prescribed. In the ordaining of a deacon, this is the reason why the bishop alone is to impose his hands upon him: he is not ordained to the priesthood, but to serve the bishop and to fulfill the bishop’s command. He has no part in the council of the clergy, but is to attend to his own duties and is to acquaint the bishop with such matters as are needful. . . .
"On a presbyter, however, let the presbyters impose their hands because of the common and like Spirit of the clergy. Even so, the presbyter has only the power to receive [the Spirit], and not the power to give [the Spirit]. That is why a presbyter does not ordain the clergy; for at the ordaining of a presbyter, he but seals while the bishop ordains.
“Over a deacon, then, let the bishop speak thus: ‘O God, who have created all things and have set them in order through your Word; Father of our Lord Jesus Christ, whom you sent to minister to your will and to make clear to us your desires, grant the Holy Spirit of grace and care and diligence to this your servant, whom you have chosen to serve the Church and to offer in your holy places the gifts which are offered to you by your chosen high priests, so that he may serve with a pure heart and without blame, and that, ever giving praise to you, he may be accounted by your good will as worthy of this high office: through your Son Jesus Christ, through whom be glory and honor to you, to the Father and the Son with the Holy Spirit, in your holy Church, both now and through the ages of ages. Amen’” (The Apostolic Tradition 9 [A.D. 215]).
"When a deacon is to be ordained, he is chosen after the fashion of those things said above, the bishop alone in like manner imposing his hands upon him as we have prescribed. In the ordaining of a deacon, this is the reason why the bishop alone is to impose his hands upon him: he is not ordained to the priesthood, but to serve the bishop and to fulfill the bishop’s command. He has no part in the council of the clergy, but is to attend to his own duties and is to acquaint the bishop with such matters as are needful. . . .
"On a presbyter, however, let the presbyters impose their hands because of the common and like Spirit of the clergy. Even so, the presbyter has only the power to receive [the Spirit], and not the power to give [the Spirit]. That is why a presbyter does not ordain the clergy; for at the ordaining of a presbyter, he but seals while the bishop ordains.
“Over a deacon, then, let the bishop speak thus: ‘O God, who have created all things and have set them in order through your Word; Father of our Lord Jesus Christ, whom you sent to minister to your will and to make clear to us your desires, grant the Holy Spirit of grace and care and diligence to this your servant, whom you have chosen to serve the Church and to offer in your holy places the gifts which are offered to you by your chosen high priests, so that he may serve with a pure heart and without blame, and that, ever giving praise to you, he may be accounted by your good will as worthy of this high office: through your Son Jesus Christ, through whom be glory and honor to you, to the Father and the Son with the Holy Spirit, in your holy Church, both now and through the ages of ages. Amen’” (The Apostolic Tradition 9 [A.D. 215]).
Council of Nicaea I
"It has come to the knowledge of the holy and great synod that, in some districts and cities, the deacons administer the Eucharist to the presbyters , whereas neither canon nor custom permits that they who have no right to offer [the Eucharistic sacrifice] should give the Body of Christ to them that do offer [it]. And this also has been made known, that certain deacons now touch the Eucharist even before the bishops. Let all such practices be utterly done away, and let the deacons remain within their own bounds, knowing that they are the ministers of the bishop and the inferiors of the presbyters. Let them receive the Eucharist according to their order, after the presbyters, and let either the bishop or the presbyter administer to them" (Canon 18 [A.D. 325]).