Genesis 23:16-18

16Abraham agreed to Ephron’s terms. So he weighed out for Ephron the amount stated in front of the Hittites: ten pounds of silver at the current merchants’ exchange rate.

17So Ephron’s field at Machpelah, east of Mamre, was sold

18to Abraham. His property included the field with the cave in it as well as all the trees inside the boundaries of the field. The Hittites together with all who had entered the city gate were the official witnesses for the agreement.