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. There were no stamped coins with a fixed value in Canaan at that time, but there seem to have been pieces of silver of a definite weight, which could readily be weighed out. In a transaction such as that recorded here, these pieces were weighed out in order to show that no fraud was being attempted. Abraham weighed out full measure, as it was required with the merchants, in honest business Christians, as the apostle rightly says, will avoid even the appearance of evil. Abraham here gave evidence of his faith by buying a small piece of land in the country which was promised to his descendants, being sure that the Lord would keep His promise.