One of the most difficult objectives of research into sacred traditions is to reveal their underlying origins. For early periods, about which we have scanty and sporadic information, the scholar must be content with indicating the earliest piece of historical evidence that connects a tradition with a specific site, though the reasons for this connection often remain unexplained. The tradition that locates the tomb of King David on Mount Zion, the southwestern hill of ancient Jerusalem, has often been considered one such case. Nevertheless this case seems to be exceptional. In this study I shall attempt to show that it is possible not only to indicate the connection between a site and a tradition, but also to explain the circumstances of the emergence of this tradition.