The particular form of the Hebrew verb רוּק
rûwq (
Strong's #7324) used for "armed/led forth/called out" depending on your translation actually means to "cause to pour out" and can even be used of unsheathing a weapons such as a sword which is effectively what Abraham was doing. Some of the modern translations, as does the ancient Samaritan
Pentateuch, assume a Hebrew typo and replace ר "r" with ד "d" making it the verb "to muster". Curiously, the Greek Old Testament version, the
Septuagint, actually has a verb meaning "to number",
arithmeô (from which we get arithmetic), here which may support the idea of "mustering". This "numbering", in turn, may have given later commentators the hint that the number itself held significance.
As the Hebrew alphabet has no numbers they are represented by full words or by the individual letters themselves standing for numbers; letters 1-9 represent the numerals, letters 10-18 the tens, and letters 19-22 cover the first four hundreds. It has gone unnoticed that Abraham's chief servant, Eliezer, and described as his sole heir in
Genesis 15:2, has a Hebrew name that adds up to 318 = ע 1 + ל 30 + י 10 + א 70 + ז 7 + ר 200.
Because of the use of the word "dedicated" above to indicate in-house training, though not necessarily military and more likely domestic, later Jewish commentators in the Talmud wrote:
"R. Abbahu said in R. Eleazar's name: Why was our Father Abraham punished and his children doomed to Egyptian servitude for two hundred and ten years? Because he pressed scholars into his service, as it is written, 'he armed his dedicated servants born in his own house'. … Rab said, he equipped them by [teaching them] the Torah. … R. Ammi b. Abba said: Eliezer outweighed them all. Others say, It was Eliezer, for this is the numerical value of his name." (Talmud, Nedarim 32a)
This indicates early knowledge of the numerical equivalent with Eliezer and the idea that "dedicated" could mean "discipled" in Jewish belief as even some Christian commentators such as Calvin and Gill thought.
In the early church, in the late first and second centuries, some writers made use of 318 (made up of 300+10+8, rather than as in Eliezer's name) to signify Jesus on the cross. In Greek, which can also use the numerical=alphabetical system as it too is without numerals,
Tau=300 and is equivalent to the Hebrew letter,
Tau, both of which represent a cross in the shape of a capital 'T', which is closer to the shape of a crucifixion cross than a modern crucifix. The 18 comes from
Eta plus
Iota, which stood in the Greek alphabet order where ח
cheth and י
yodh stand in the Hebrew, thus they stood for 8 and 10 respectively, making the 18. Now,
IH, in Greek is
Iota-Eta, the first two letters of Jesus' name ΙΣΟΥΣ,
iêsous, just as God's name,
YHVH, could be represented by its shorter version
YH (
Yah). So the Epistle of Barnabas, written between 70-135 A.D. says:
For [the Scripture] saith, "And Abraham circumcised ten, and eight, and three hundred men of his household." What, then, was the knowledge given to him in this? Learn the eighteen first, and then the three hundred. The ten and the eight are thus denoted - Ten by I, and Eight by H. You have [the initials of the, name of] Jesus. And because the cross was to express the grace [of our redemption] by the letter T, he says also, "Three Hundred." He signifies, therefore, Jesus by two letters, and the cross by one. (Epistle of Barnabas 9.8)
Writing later in the 3rd century, Clement of Alexandria in his
Stromata, "Miscellanies", on 'The Mystical Meanings In The Proportions Of Numbers, Geometrical Ratios, And Music' says:
As then in astronomy we have Abraham as an instance, so also in arithmetic we have the same Abraham. For, hearing that Lot was taken captive, and having numbered his own servants, born in his house, 318, he defeats a very great number of the enemy. They say, then, that the character representing 300 is, as to shape, the type of the Lord's sign, and that the Iota and the Eta indicate the Saviour's name; that it was indicated, accordingly, that Abraham's domestics were in salvation, who having fled to the Sign and the Name became lords of the captives, and of the very many unbelieving nations that followed them. (Clement, Stromata, Book 6, Chapter 11)
So Christian numerological interpretation is just as fanciful as some Jewish numerical word plays. Certainly, we can give full marks for ingenuity and there is no harm done in the meaning given. Nonetheless, it is more probably in a book like Genesis of history not prophecy that historical accuracy rather than symbolism is intended and what is being portrayed is Abraham's wealth and status in being able to raise 318 fighting men.