7:1 - For this Melchisedec, king of Salem, priest of the most high God, who met Abraham returning from the slaughter of the kings, and blessed him;

Theophilus to Autolycus Book II
And at that time there was a righteous king called Melchisedek, in the city of Salem, which now is Jerusalem. This was the first priest of all priests[66]
Tertullian An Answer to the Jews
if not on the ground of equity and righteousness, (in the observance) of a natural law? Whence was Melchizedek named "priest of the most high God,"[25]
Pseudo-Tertullian Against All Heresies
(without genealogy), of whom neither the beginning nor the end has been comprehended, nor can be comprehended.[88]

7:2 - To whom also Abraham gave a tenth part of all; first being by interpretation King of righteousness, and after that also King of Salem, which is, King of peace;

Clement of Alexandria Stromata Book II
He is Melchizedek, "King of peace,"[46]
The Testaments of the Twelve Patriarchs VI
the Light of righteousness, and healing[8]

7:3 - Without father, without mother, without descent, having neither beginning of days, nor end of life; but made like unto the Son of God; abides a priest continually.

Lactantius Divine Institutes Book IV
Nevertheless it was His pleasure that He should be born as a man, that in all things He might be like His supreme Father· For God the Father Himself, who is the origin and source of all things, inasmuch as He is without parents, is most truly named by Trismegistus "fatherless" and "motherless,"[125]

7:14 - For it is evident that our Lord sprang out of Juda; of which tribe Moses spoke nothing concerning priesthood.

Julius Africanus The Epistle to Aristides
And they ought not indeed to have been ignorant that both orders of the ancestors enumerated are the generation of David, the royal tribe of Juda.[5]

7:19 - For the law made nothing perfect, but the bringing in of a better hope did; by the which we draw nigh unto God.

Five Books in Reply to Marcion
By the arrival of the "perfect things."[260]

7:21 - (For those priests were made without an oath; but this with an oath by him that said unto him, The Lord swore and will not repent, You are a priest for ever after the order of Melchisedec:)

Hippolytus Refutation of All Heresies Book V
And this oath, (Justinus) says, our Father Elohim sware when He was beside the Good One, and having sworn He did not repent (of the oath), respecting which, he says, it has been written, "The Lord sware, and will not repent."[282]
Acts of the Holy Apostles Peter and Paul
Whence also the prophet says, The Lord hath sworn, and will not repent: Thou art a priest for ever, after the order of Melchizedec.[16]

7:26 - For such an high priest became us, who is holy, harmless, undefiled, separate from sinners, and made higher than the heavens;

Tertullian On Modesty
and in all respects holy,[292]