Genesis 23:17-18

Abraham’s purchase of the cave of Machpelah (lit. double cave, or split cave) indicates his continuing faith in God’s promise to give the land of Canaan to him and his descendants. Similarly Jeremiah purchased property in the Promised Land on the eve of the Babylonian captivity to express his belief that God would bring the Israelites back there eventually (cf. Jeremiah 32:6-15). One does not usually bury his family in a place unless he considers it his home and plans to be there a long time.