A.H. 513
... In this year also some who came from Jerusalem told of the discovery of the tombs of the prophets al-Khalil (Abraham)
and his two sons Isaac and Jacob, may blessing from God be upon them and peace. They related that they were all together in a
cave in the land of Jerusalem, and that they were as if alive, no part of their bodies having decayed, and no bones rotted,
and that suspended over them in the cave were lamps of gold and silver. The graves were then restored to their former condition.
This is the story precisely as it was told, but God is more knowing of the truth than any other.