Genesis 19:30

19:30 Lot went up from Zoar with his two daughters and settled in the mountains because he was afraid to live in Zoar. So he lived in a cave with his two daughters.

Genesis 49:30

49:30 It is the cave in the field of Machpelah, near Mamre in the land of Canaan, which Abraham bought for a burial plot from Ephron the Hittite.