حسن الصباح
Sanjar undertook a campaign to eliminate the Assassins within Persia and successfully drove them from a number of their strongholds including Quhistan and Tabas. However, an anecdote indicates that en route to their stronghold at Alamut, Sanjar woke up one day to find a dagger beside him, pinning a note from Hassan-i Sabbah stating that he (Hassan) would like peace. Sanjar, shocked by this event, sent envoys to Hassan and they both agreed to stay out of each other's way.