Now consider how great this man was, unto whom even the patriarch Abraham gave the tenth of the spoils.
Consider - earnestly, not merely see х theooreite (G2334): weigh with attentive contemplation].
Also, ['Aleph (') A C, Vulgate. But B Delta omit kai (G2532)] - 'to whom (as his superior) Abraham even paid tithe (went so far as to pay tithe) of (consisting of) the best of the spoils' х ek (G1537) ton (G3588) akrothinioon (G205): from the top of the heap, from which the general used to take some portion for consecration to God, or for his own use]. Abraham paid 'tithes of ALL;' and these taken out of the topmost and best portion of the whole spoils.
The patriarch - in the Greek emphatically standing last: and this payer of tithe being no less a personage than "the patriarch," the first fore-father and head of our Jewish race (note, Hebrews 7:3, on Melchisedek's superiority as specially-consecrated king-priest above other patriarch-priests.