Tobias Scheunchen (eds.), "Ṣiffīn - صفين " in The Beth Qaṭraye Gazetteer last modified January 10, 2020, https://bqgazetteer.bethmardutho.org/place/5471
  
    
      
        
          Ṣiffīn
          صفين
          Siffin
          
          A town located at the Euphrates in the east of Syria and known for the historic Battle of Siffin. قال ابن جزي: ويقال: إن أويساً قتل بصفّين مع علي عليه السلام
                    
                        35.95 39.0167
                    
          https://bqgazetteer.bethmardutho.org/place/5471
          http://syriaca.org/place/5471
          https://tools.wmflabs.org/geohack/geohack.php?language=ar&pagename=وقعة_صفين&params=35.95_N_39.0167_E_globe:earth_type:landmark
          
            Riḥlat Ibn Baṭṭūta. Tuḥfat al-nuẓẓār fī gharāʾib al-amṣār wa-ʿajāʾib al-asfār
                        Ibn Baṭṭūta
                        
            114
          
                    
                        https://tools.wmflabs.org/geohack/geohack.php?language=ar&pagename=وقعة_صفين&params=35.95_N_39.0167_E_globe:earth_type:landmarkGeoHack 
                    Riḥlat Ibn Baṭṭūta. Tuḥfat al-nuẓẓār fī gharāʾib al-amṣār wa-ʿajāʾib al-asfārIbn Baṭṭūta114