Genesis 23:16
And Abraham hearkened unto Ephron; and Abraham weighed to Ephron the silver, which he had named in the audience of the sons of Heth, four hundred shekels of silver, current money with the merchant. And Abraham hearkened unto Ephron; and Abraham weighed to Ephron the silver, which he had named in the audience of the sons of Heth, four hundred shekels of silver, current money with the merchant.
The verse completes Abraham's purchase of a cave in which to bury his beloved Sarah from Ephron and the sons of Heth, by weighing out the agreed silver publicly before them in the audience of those witnesses. That burial cave is Machpelah at Hebron, which served as the burial place of the patriarchs. In the transaction Abraham bowed before the sons of Heth. His conduct is the finest example of the power of true courtesy, showing courtesy and respect toward fellow men, what is due from one person to another, and what it means to be a Christian gentleman and a true gentleman.
Although God had promised Abraham the whole of Canaan, he owned none of it and had to buy with silver even a place to bury Sarah. This shows he lived as a pilgrim and stranger in the promised land, without earthly prosperity in land or possessions, and he was satisfied because he had been shown immortal life on this earth purified as his future home. It teaches those who follow the light God gives, even when called to leave positions of interest and to endure trial, to seek the city whose builder and maker is God and not to expect full reward here in land or gold or silver but to expect an eternal weight of glory.