Genesis 14:23

The patriarch's contempt for material wealth was intense. Why is it with an oath that he rejects the offer in the words "I will raise my hand to swear before God the most high, who created heaven and earth"? He wants to give the king of Sodom two lessons. First, he is above the gifts offered by him; and this gives evidence of great wisdom. He is ready to prove an instructor for him in reverence, as if to teach him in so many words: I am calling to witness the Creator of all that I will take nothing of yours, so that you may come to know the God over all and not regard as gods the things shaped by human hands. This One in fact is the maker of heaven and earth, who indeed determined the course of this war and was the cause of victory. So don't expect me to be ready to take anything you've offered me. It was not, you see, for a reward that I wreaked vengeance. Instead, in the first instance it was out of love for my nephew, and then from the very nature of a good man that I should wrest from the clutches of barbarians people wrongfully abducted.

He would not take even a chance item, even something worthless or anything thought beneath contempt, even the shoelace at the tip of the shoe, where it comes to a point. Then he states the reason for his refusal. It is "in case you were to say, 'I gave Abram his wealth.' I have on my side the supplier of countless goods; I enjoy much favor from on high. I have no need of wealth from you. I don't want human resources. I am content with the regard God pays me. I know the generosity of his gifts toward me. Having yielded to Lot worthless scraps, I have been granted great promises beyond telling. Now by not accepting wealth from you I earn for myself greater wealth and enjoy further grace from him." This in my opinion … was the reason why he took the oath in the words "I will raise my hand to swear before God the most high"; namely, that the king should not think that he was simply putting up a pretense about what was likely to happen but should rather be quite clear about his not taking the least trinket from him. He was honoring that command given by Christ to the disciples: "Freely you have received, freely give." In other words, he is saying, Surely I have contributed nothing to the course of the war other than consent and encouragement, whereas the victory and the spoils and everything else has been God's work in his invisible might.

But the king of Sodom said to Abram, "Give me the persons, and take the goods for yourself." But he replied to him, "I raise my hand to the Lord, God most high, possessor of heaven and earth, that I will not take a thread …

Rich countries are a desirable prey, and idle luxurious countries are an easy prey, to growing greatness. The Sodomites were the posterity of Canaan whom Noah had pronounced a servant to Shem, from whom Elam descended; thus soon did that prophecy begin to e fulfilled.

What are all the ornaments and delights of sense to one that has God and heaven ever in his eye? He resolves even to a thread and a shoe-latchet; for a tender conscience fears offending in a small matter.