Genesis 23:17-20

That’s how Ephron’s field next to Mamre—the field, its cave, and all the trees within its borders—became Abraham’s property. The town council of Hittites witnessed the transaction. Abraham then proceeded to bury his wife Sarah in the cave in the field of Machpelah that is next to Mamre, present-day Hebron, in the land of Canaan. The field and its cave went from the Hittites into Abraham’s possession as a burial plot.