Isaac.

Genesis 21:9, 10
But Sarah saw that the son whom Hagar the Egyptian had borne to Abraham was mocking her son, . . .

Genesis 35:29
Then he breathed his last and died and was gathered to his people, old and full of years. And his sons Esau and Jacob buried him.

in the cave.

Genesis 23:9-20
to sell me the cave of Machpelah that belongs to him; it is at the end of his field. Let him sell it to me in your presence for full price, so that I may have a burial site." . . .

Genesis 49:29, 30
Then Jacob instructed them, "I am about to be gathered to my people. Bury me with my fathers in the cave in the field of Ephron the Hittite. . . .

Genesis 50:13
They carried him to the land of Canaan and buried him in the cave at Machpelah in the field near Mamre, which Abraham had purchased from Ephron the Hittite as a burial site.