 According to some Islamic sources the cave is also the tomb of Joseph.Though the Bible has Joseph buried in Shechem (the present-day Palestinian city of Nablus), Jewish aggadic tradition conserved the idea that he wished to be interred at Hebron, and the Islamic version may reflect this.The Jewish apocryphal book, The Testaments of the Twelve Patriarchs, also states that this is the burial place of Jacob's twelve sons.