Random thought: Did Abram tithe to Melchizedek because he was king or because he was priest? Why? What's the significance? If your answer is both, why?
Both....
The numbers, 7, and 10 and 12 are special in biblical accounts; For example, 7 is the number of "oath", and whenever the Jews speak of "swearing", they literally say something like "seven one's self."; The number 10 is more curious; for when the Hebrews entered Egypt, they either imparted or picked up (I think the latter) the idea that 10 means God or divinity or perfection.
Consider one of the most prominent ideas where 10 is used; for If one counts the actual sentences in the 10 commandments, there are more than 10; and there are different ways to group the commands so that there are 10 groups of words, but no way to make it exactly 10 words. Yet the bible says there are 10 words Deka-Logue (10-words / commands);
It's important to grasp that they are called 10 most strongly on account of the commands being
directly from God; not on account of the physical number of words that Moses wrote down on a scroll at a later time.
Basically the number 10 became a Hebrew idiom for the idea divinity, magnification, and perfection; so that when Moses later wrote down the story's of Abraham, the numbers 7 and 10 are signs representing oath and God respectively.
Just so, when the biblical account says "tithe"; that word literally means to take a "tenth" part, and therefore, as an idea -- means to give something to God.
That's what Abraham did with Melchizadech -- he gave him a "tenth".
So, when I look at Melchizadech -- I'm thinking, Abrham must have seen him as God's representative on earth; that is, as God's anointed. And I know that two kinds of anointing that come from God are priest and king.
Even foreign kings are called "God's anointed" when they represent the will of God; not just priests of God.
Isaiah 45:1 Thus saith the LORD
to his anointed,
to Cyrus, whose right hand I have holden, to subdue nations before him; and I will loose the loins of kings, to open before him the two leaved gates; and the gates shall not be shut;
And so Paul also recognizes that Kings, by being authorities who uphold law, are to be directed by God:
1Timothy 2:1 I exhort therefore, that, first of all, supplications, prayers, intercessions, and giving of thanks, be made for
all men;
1Timothy 2:2
For kings, and for all that are in authority; that we may lead a quiet and peaceable life in all godliness and honesty.
And I am sure that inasmuch as a king represents God, by virtue of a law or contract; a king is entitled to tribute.
Even wicked kings deserve as much.
Matthew 22:17 Tell us therefore, What thinkest thou? Is it lawful to give tribute unto Caesar, or not?
Matthew 22:18 But Jesus perceived their wickedness, and said, Why tempt ye me, ye hypocrites?
Matthew 22:19 Shew me the tribute money. And they brought unto him a penny.
Matthew 22:20 And he saith unto them, Whose is this image and superscription?
Matthew 22:21 They say unto him, Caesar's. Then saith he unto them,
Render therefore unto Caesar the things which are Caesar's; and unto God the things that are God's.
With that in mind, when I look at the passage in Genesis that you speak of, My attention is drawn to how clearly the scriptures set out to compare and contrast a King with a Priest-King;
The number ten in the form of a "tithe" is used only of what Abraham gave to Melchizadek
of everything (off the top) before he gives anything to the king of Sodom. And it seems that he may have given some of the wealth of Sodom to Melchizadech, too, as a "thank you" to God for a blessing which saved the Sodomites through Abraham hand.
Genesis 14:18 And Melchizedek king of Salem brought forth bread and wine: and he was the priest of the most high God.
Genesis 14:19 And he blessed him, and said, Blessed be Abram of the most high God, possessor of heaven and earth:
Genesis 14:20 And blessed be the most high God, which hath delivered thine enemies into thy hand. And he gave him
tithes of
all.
Genesis 14:21 And the king of Sodom said unto Abram, Give me the persons, and take the goods to thyself.
Genesis 14:22 And Abram said to the king of Sodom, I have lift up mine hand unto the LORD, the most high God, the possessor of heaven and earth,
Genesis 14:23 That I will not take from a thread even to a shoelatchet, and that I will not take any thing that is thine, lest thou shouldest say, I have made Abram rich:
Genesis 14:24 Save only that which the young men have eaten, and the portion of the men which went with me, Aner, Eshcol, and Mamre; let them take their portion.
In terms of quantity, though; Abraham gives close to 90% of the remaining wealth to the king of Sodom -- but with the caveat that he now owes the king of Sodom *nothing*. The king of Sodom can not call upon Abraham to fight in a future war as a pre-paid mercenary.
I think, then, that there is more than one probable reason Abraham gave Melchizedech wealth:
1) The king of Salem as a priest can be
the witness to Abraham's oath (Genesis 14:22-23) who knows the amount since he had 1/10th of it.
2) Abraham evidently crossed the king of Salem's land during the battle and return from it; and it's unclear if Melchizadech was in the battle -- but even if he wasn't -- it's not improper to pay him as king, either, for the use of his roadway (eg: tax, or money to reassure him they intend him and his people no harm.).
3) Abraham recognizes the blessing of God in protecting him during battle so that he gives an amount which recognizes that it is "God" to whom the wealth belongs; and he does so to a priest as a "Thank you" to God.
So, it is definitely because he is a Priest but I think it is also because he is God's anointed king.