13:2 - Be not forgetful to entertain strangers: for thereby some have entertained angels unexpectedly.

Tertullian On Prayer
, "a brother? you have seen your Lord; "[172]

13:4 - Marriage is honourable in all, and the bed undefiled: but whoremongers and adulterers God will judge.

Clement of Alexandria Stromata Book IV
And then, as putting the finishing stroke to the question about marriage, he adds: "Marriage is honourable in all, and the bed undefiled: but whoremongers and adulterers God will judge."[191]
Constitutions of the Holy Apostles Book VI
Wherefore "marriage is honourable"[169]
The First Epistle of Clement Concerning Virginity
those who have passed a wedded life in sanctity, and whose "bed has not been defiled."[32]

13:7 - Remember them which have the rule over you, who have spoken unto you the word of God: whose faith follow, considering the end of their conversation.

Didache
My child, him that speaketh to thee the word of God remember night and day; and thou shalt honour him as the Lord;[42]
The First Epistle of Clement Concerning Virginity
For the Scripture has said, "The elders who are among you, honour; and, seeing their manner of life and conduct, imitate their faith."[55]

13:8 - Jesus Christ the same yesterday, and to day, and for ever.

Alexander Epistles on the Arian Heresy
For even though one saying may refer to the Father Himself, yet it would now be more aptly spoken of the Word, because when He became man, He changed not; but, as says the apostle, "Jesus Christ, the same yesterday, today, and for ever."[57]

13:10 - We have an altar, whereof they have no right to eat which serve the tabernacle.

Cyprian Treatise XII Three Books of Testimonies Against the Jews
Of this same thing in the Gospel according to Matthew: If thou wouldest offer thy gift at the altar, and there rememberest that thy brother hath ought against thee; leave thou thy gift before the altar, and go; first be reconciled to thy brother, and then come and offer thy gift at the altar."[384]

13:12 - Wherefore Jesus also, that he might sanctify the people with his own blood, suffered without the gate.

Five Books in Reply to Marcion
By His own death redeemed), without the camp[229]

13:14 - For here have we no continuing city, but we seek one to come.

Shepherd of Hermas Similitude First
He says to me, "You know that you who are the servants of God dwell in a strange land; for your city is far away from this one.[2]
Clement of Alexandria Stromata Book IV
But rather, he says, "Follow peace with all men, and holiness, without which no man shall see the Lord: looking diligently, lest there be any fornicator or profane person, as Esau, who for one morsel surrendered his birth-right; and lest any root of bitterness springing up trouble you, and thereby many be defiled."[190]

13:15 - By him therefore let us offer the sacrifice of praise to God continually, that is, the fruit of our lips giving thanks to his name.

Fragments from the Lost Writings of Irenaeus
And again, "Let us offer the sacrifice of praise, that is, the fruit of the lips."[76]
Didache
that your sacrifice may be pure.[125]

13:17 - Obey them that have the rule over you, and submit yourselves: for they watch for your souls, as they that must give account, that they may do it with joy, and not with grief: for that is useless for you.

1 Clement
whose blood was given for us; let us esteem those who have the rule over us;[104]
Epistle of Ignatius to the Trallians
Be ye subject to the bishop as to the Lord, for "he watches for your souls, as one that shall give account to God."[9]
Shepherd of Hermas Vision Third
I also, standing joyful before your Father, may give an account of you all to your Lord."[42]