3:1 - Put them in mind to be subject to principalities and powers, to obey magistrates, to be ready to every good work,

1 Clement
Ye mourned over the transgressions of your neighbours: their deficiencies you deemed your own. Ye never grudged any act of kindness, being "ready to every good work."[12]
Martyrdom of Polycarp
" But Polycarp said, "To thee I have thought it right to offer an account [of my faith]; for we are taught to give all due honour (which entails no injury upon ourselves) to the powers and authorities which are ordained of God.[28]
Tertullian On Idolatry
"subject to magistrates, and princes, and powers; "[121]
Constitutions of the Holy Apostles Book IV
Be ye Subject to all royal power and dominion in things which are pleasing to God, as to the ministers of God, and the punishers of the ungodly.[33]

3:2 - To speak evil of no man, to be no brawlers, but gentle, showing all meekness unto all men.

Cyprian Treatise XII Three Books of Testimonies Against the Jews
"To speak ill of no man, nor to be litigious."[798]

3:3 - For we ourselves also were sometimes foolish, disobedient, deceived, serving divers lusts and pleasures, living in malice and envy, hateful, and hating one another.

Clement of Alexandria Exhortation to the Heathen
" Thus speaks the apostolic Scripture: "But after that the kindness and love of God our saviour to man appeared, not by works of righteousness which we have done, but according to His mercy, He saved us."[7]
Origen Against Celsus Book I
But after that the kindness and love of God our Saviour towards man appeared, by the washing of regeneration, and renewing of the Holy Ghost, which He shed upon us richly,"[127]

3:5 - Not by works of righteousness which we have done, but according to his mercy he saved us, by the washing of regeneration, and renewing of the Holy Spirit;

Tertullian On Modesty
modesty which is being shaken to its foundation-(Christian modesty), which derives its all from heaven; its nature, "through the layer of regeneration; "[5]
Cyprian Epistle LXXIII
But what a thing it is, to assert and contend that they who are not born in the Church can be the sons of God! For the blessed apostle sets forth and proves that baptism is that wherein the old man dies and the new man is born, saying, "He saved us by the washing of regeneration."[13]
Methodius Discourse III. Thaleia
and they are not ashamed to run counter to the Spirit, but, as though born for this purpose, they kindle up the smouldering and lurking passion, fanning and provoking it; and therefore he, cutting off very sharply these dishonest follies and invented excuses, and having arrived at the subject of instructing them how men should behave to their wives, showing that it should be as Christ did to the Church, "who gave Himself for it, that He might sanctify and cleanse it by the washing[36]
Methodius Oration Concerning Simeon and Anna
And all this was, not of works of righteousness[71]
Origen Commentary on Matthew Book XIII
Then again one might inquire at what time those who are called their angels assume guardianship of the little ones pointed out by Christ; whether they received this commission to discharge concerning them, from what time "by the laver of regeneration,"[168]

3:9 - But avoid foolish questions, and genealogies, and contentions, and strivings about the law; for they are useless and vain.

Tertullian The Prescription Against Heretics
and "unprofitable questions,"[75]

3:10 - A man that is an heretic after the first and second admonition reject;

Irenaeus Against Heresies Book III
" Such was the horror which the apostles and their disciples had against holding even verbal communication with any corrupters of the truth; as Paul also says, "A man that is an heretic, after the first and second admonition, reject; knowing that he that is such is subverted, and sinneth, being condemned of himself."[9]
Tertullian The Prescription Against Heretics
who also intimates to Titus, that "a man who is a heretic" must be "rejected after the first admonition," on the ground that "he that is such is perverted, and committeth sin, as a self-condemned man."[49]
Origen de Principiis Book II
We have heard, indeed, that certain heretics have dared to say that there are two Gods and two Christs, but we have never known of the doctrine of two Holy Spirits being preached by any one.[105]
Origen Against Celsus Book V
And if those who hold different opinions will not be convinced, we observe the injunction laid down for the treatment of such: "A man that is a heretic, after the first and second admonition, reject, knowing that he that is such is subverted, and sinneth, being condemned of himself."[197]
Cyprian Epistle LIV
And again: "A man that is an heretic, after one admonition, reject: knowing that he that is such is subverted, and sinneth, being condemned of himself."[66]
Cyprian Treatise XII Three Books of Testimonies Against the Jews
To Titus: "A man that is an heretic, after one rebuke avoid; knowing that one of such sort is perverted, and sinneth, and is by his own self condemned."[729]
Dionysius A Commentary on the Beginning of Ecclesiastes
A time to speak, when there are hearers who receive the word; but a time to keep silence, when the hearers pervert the word; as Paul says: "A man that is an heretic, after the first and second admonition, reject."[36]

3:11 - Knowing that he that is such is subverted, and sins, being condemned of himself.

Cyprian Epistle LXXIII
But if everywhere heretics are called nothing else than adversaries and antichrists, if they are pronounced to be people to be avoided, and to be perverted and condemned of their own selves, wherefore is it that they should not be thought worthy of being condemned by us, since it is evident from the apostolic testimony[6]