Soltan Sahak is the pivotal figure of the Yarsani (Ahl-e Haqq) religion of the Kurds. Doctrine teaches that the one Divine Essence reveals itself in a sequence of manifestations, and that in the dispensation centred on the Guran district of western Iran the Essence appeared as Soltan Sahak, who gave the faith its enduring institutions: the assembly of the jam, the sacrament of the consecrated offering, the heptad of holy companions, and the spiritual lineages descended from them. Birth-legend holds that his mother, the virgin Dayerak (Khatun Dayrak) of the Jaff people, conceived him when a pomegranate seed fell into her mouth as she slept beneath the tree; she is herself understood as an earthly manifestation of the mother-angel Razbar. His teachings are preserved in the Gurani sacred poetry of the Kalam-e Saranjam and are chanted to the sacred lute, the tanbur.