Now consider, etc. This is the fourth comparison between Christ and Melchisedec, that Abraham presented tithes to him. But though tithes were instituted for several reasons, yet the Apostle here refers only to what serves his present purpose. One reason why tithes were paid to the Levites was, because they were the children of Abraham, to whose seed the land was promised. It was, then, by a hereditary right that a portion of the land was allotted to them; for as they were not allowed to possess land, a compensation was made to them in tithes. There was also another reason, -- that as they were occupied in the service of God and the public ministry of the Church, it was right that they should be supported at the public cost of the people. Then the rest of the Israelites owed them tithes as a remuneration for their work. But these reasons bear not at all on the present subject; therefore, the Apostle passes them by. The only reason now alleged is, that as the people offered the tithes as a sacred tribute to God, the Levites only received them. It hence appears that it was no small honor that God in a manner substituted them for himself. Then Abraham, being one of the chief sergeants of God and a prophet, having offered tithes to Melchisedec the priest, thereby confessed that Melchisedec excelled him in dignity. If, then, the patriarch Abraham owned him more honourable than himself, his dignity must have been singular and extraordinary. The word patriarch is mentioned for the sake of setting forth his dignity; for it was in the highest degree honourable to him to have been called a father in the Church of God. Then the argument is this, -- Abraham, who excelled all others, was yet inferior to Melchisedec; then Melchisedec had the highest place of honor, and is to be regarded as superior to all the sons of Levi. The first part is proved, for what Abraham owed to God he gave to Melchisedec: then by paying him the tenth he confessed himself to be inferior.

Now consider how great this man was - The object of the apostle was to exalt the rank and dignity of Melchizedek. The Jews had a profound veneration for Abraham, and if it could be shown that Melchizedek was superior to Abraham, then it would be easy to demonstrate the superiority of Christ as a priest to all who descended from Abraham. Accordingly he argues, that he to whom even the patriarch Abraham showed so much respect, must have had an exalted rank. Abraham, according to the views of the East, the illustrious ancestor of the Jewish nation, was regarded as superior to any of his posterity, and of course was to be considered as of higher rank and dignity than the Levitical priests who were descended from him.
Even the patriarch Abraham - One so great as he is acknowledged to have been. On the word "patriarch," see the notes on Acts 2:29. It occurs only in Acts 2:29; Acts 7:8-9, and in this place.
Gave the tenth of the spoils - see the notes, Hebrews 7:2. The argument here is, that Abraham acknowledged the superiority of Melchizedek by thus devoting the usual part of the spoils of war, or of what was possessed, to God by his hands, as the priest of the Most High. Instead of making a direct consecration by himself, he brought them to him as a minister of religion, and recognized in him one who had a higher official standing in the matter of religion than himself. The Greek word rendered here "spoils" - ἀκροθίνιον akrothinion - means literally, "the top of the heap," from ἄκρον akron, "top," and θίν thin, "heap." The Greeks were accustomed, after a battle, to collect the spoils together, and throw them into a pile, and then, before they were distributed, to take off a portion from the top, and devote it to the gods; Xen. Cyro. 7, 5, 35; Herod. i. 86, 90; 8:121, 122; Dion. Hal. ii. In like manner it was customary to place the harvest in a heap, and as the first thing to take off a portion from the top to consecrate as a thank-offering to God. The word then came to denote the "first-fruits" which were offered to God, and then the best of the spoils of battle. It has that sense here, and denotes the spoils or plunder which Abraham had taken of the discomfited kings.

Consider how great this man was - There is something exceedingly mysterious in the person and character of this king of Salem; and to find out the whole is impossible. He seems to have been a sort of universal priest, having none superior to him in all that region; and confessedly superior even to Abraham himself, the father of the faithful, and the source of the Jewish race. See Hebrews 7:7.
The patriarch Abraham - Ὁ πατριαρχης· Either from πατηρ, a father, and αρχη, a chief or head; or from πατριας αρχη, the head of a family.' But the title is here applied, by way of eminence, to him who was the head or chief of all the fathers - or patriarch of the patriarchs, and father of the faithful. The Syriac translates it Rish Abahatha, "head of the fathers." The character and conduct of Abraham place him, as a man, deservedly at the head of the human race.

(3) Now consider how great this man [was], unto whom even the patriarch Abraham gave the tenth of the spoils.
(3) Another figure: Melchizedek in his priesthood was above Abraham for he took tithes from him, and blessed him as a priest. Such a one indeed is Christ, on whom depends even Abraham's sanctification and all the believers, and whom all men should worship and reverence as the author of all.

Now consider how great this man was,.... Melchizedek, of whom so many great and wonderful things are said in the preceding verses: and as follows,
unto whom the patriarch Abraham gave the tenth of the spoils; of Abraham's giving tithes to him; see Gill on Hebrews 7:2 and Melchizedek's greatness is aggravated, not only from this act of Abraham's, but from Abraham's being a "patriarch", who did it; he was the patriarch of patriarchs, as the sons of Jacob are called, Acts 7:8 he is the patriarch of the whole Jewish nation, and of many nations, and of all believers, the friend of God, and heir of the world; how great then must Melchizedek be, to whom he paid tithes? and how much greater must Christ, the antitype of Melchizedek, be?

That High Priest who should afterward appear, of whom Melchisedec was a type, must be much superior to the Levitical priests. Observe Abraham's great dignity and happiness; that he had the promises. That man is rich and happy indeed, who has the promises, both of the life that now is, and of that which is to come. This honour have all those who receive the Lord Jesus. Let us go forth in our spiritual conflicts, trusting in his word and strength, ascribing our victories to his grace, and desiring to be met and blessed by him in all our ways.

consider--not merely see, but weigh with attentive contemplation, the fact.
even--"to whom (as his superior) Abraham even paid tithe (went so far as to pay tithe) of (consisting of, literally, 'from') the best of the spoils (literally, 'the top of the heap"; whether of corn, the first-fruits of which, taken from the top, used to be consecrated to God; or of spoils, from the top of which the general used to take some portion for consecration to God, or for his own use)." He paid "tithes of ALL," and those tithes were taken out of the topmost and best portion of the whole spoils.
the patriarch--in the Greek emphatically standing at the end of the whole sentence: And this payer of tithe being no less a personage than "the patriarch," the first forefather and head of our Jewish race and nation See on Hebrews 7:3, on Melchisedec's superiority as specially consecrated king-priest, above the other patriarch-priests.

How great this man was. When one so great as Abraham recognized his superiority by paying him tithes.
The sons of Levi. The Aaronic priesthood, all of them of the tribe of Levi.
Take tithes of the people according to the law. They require the enactment of the law in order to collect tithes of the people, their own brethren. The tithes are paid, not because of their great spiritual dignity, but because the law compels it.
But he whose descent is not counted from them. Melchizedek, who was not of the blood of Abraham or tribe of Levi, received tithes of Abraham, not because of the law, but because of his transcendent dignity.
The less is blessed by the better. Though Abraham had the promises of God Melchizedek, as the higher in spiritual dignity and nearer to God, blessed him. See Genesis 27:27-29.
Here men that die receive tithes. The Aaronic priesthood die, and the death of the high priest is a matter of record. Their mortality was a prominent feature, but in the case of Melchizedek, he who receives tithes liveth right on as far as the records tell us. We behold him only as a living priest, typical of a priest who liveth forever.
Levi also, who receiveth tithes. The sacred tribe of Israel, the tribe to whom tithes are paid, paid tithes to Melchizedek.
He was yet. All Israel, kings and priests, though yet unborn, were represented in Abraham. Hence Levi paid tithes, and thus confessed the superiority of the priesthood of Melchizedek.

The greatness of Melchisedec is described in all the preceding and following particulars. But the most manifest proof of it was, that Abraham gave him tithes as to a priest of God and a superior; though he was himself a patriarch, greater than a king, and a progenitor of many kings.