Abraham purchased the cave to bury his wife Sarah in.
Abraham paid 400 shekels of silver to purchase the cave of Machpelah to bury Sarah.
The first purchase of land in the Bible is recorded in Genesis 23, where Abraham purchased the cave of Machpelah from the Hittites to use as a burial site for his wife Sarah. The transaction took place in Hebron, present-day Israel.
Canaan in the cave of Machpelah
Abraham is buried in the cave of Machpelah in Hebron, in Israel.
The land bought by abraham for his wife's sarah burial place,from the children of cush in planes of mamre!
Machpelah
We are not told specifically where Abraham died, but it was in the Promised Land (Canaan). As to his burial he was buried in the cave of Machpelah, which was in Mamre. Sarah, Abraham's wife who had passed on before him was buried in the same place.
Jacob's final request before he died, was to be buried in the cave in the field of Machpelah, in the land of Canaan, which his bought by his grandfather Abraham. He wanted to be buried there because his family was buried there. His grandfather Abraham and Sarah his grandmother, his father Isaac and his mother Rebekkah, and his wife (Jacob's) Leah.
Burial of Sarah. Abraham purchased the Cave of Machpelah in the field of Ephron which was before Mamre. The same is Hebron in the land of Kannan.
Genesis 25:8-10 - Then Abraham breathed his last and died in a good old age, an old man and full of years, and was gathered to his people. And his sons Isaac and Ishmael buried him in the cave of Machpelah, which is before Mamre, in the field of Ephron the son of Zohar the Hittite, the field which Abraham purchased from the sons of Heth. There Abraham was buried, and Sarah his wife. [NKJV]
The Cave of Machpelah is where Abraham is buried. That's the information that's given in Genesis 49:29-31. According to Genesis 23:19, the cave is near Hebron, which is about 20 miles/32 kilometers southwest of Jerusalem, Israel. Also according to Genesis 23:19, that's the final resting place of the Patriarch's wife Sarah.
Hebron in the Cave of Machpelah