"Come and learn: When Jacob entered the cave, all the aromas of Heaven were within her, and the cave was flooded with light with only one candle lit. And when the Patriarchs came to be with Jacob in Egypt, the light extinguished. And now that Jacob returned to the cave, the candle returned to its former state and the cave was complete and wholly once more. And until the days of the future redemption and Messiah, the cave didn't and won't accept another human for burial. And the souls of the righteous pass in front of them in the cave, so they awaken and look at the sons that they had set forth in to the world. And they will be content and joyful before G-D" {Zohar Vayechi 250}