Paus Urban II, Internet History Sourcebooks: Medieval Sourcebook. sourcebooks.fordham.edu. Fordham University, USA. Gearchiveerd op 21 mei 2022. Geraadpleegd op 22 mei 2022. "Let those who have been accustomed unjustly to wage private warfare against the faithful now go against the infidels and end with victory this war which should have been begun long ago. Let those who for a long time, have been robbers, now become knights. Let those who have been fighting against their brothers and relatives now fight in a proper way against the barbarians. (engelse vertaling uit het latijn)"
Paus Urban II, Internet History Sourcebooks: Medieval Sourcebook. sourcebooks.fordham.edu. Fordham University, USA. Gearchiveerd op 21 mei 2022. Geraadpleegd op 22 mei 2022. "Let those who have been accustomed unjustly to wage private warfare against the faithful now go against the infidels and end with victory this war which should have been begun long ago. Let those who for a long time, have been robbers, now become knights. Let those who have been fighting against their brothers and relatives now fight in a proper way against the barbarians. (engelse vertaling uit het latijn)"