《资治通鉴·唐纪·唐纪二十七》
突骑施酋长守忠被杀以后，突厥可汗默啜的兵马撤走，守忠的部将苏禄聚集余众，自己作了酋长。
突骑施守忠既死，默啜兵还，守忠部将苏禄鸠集馀众，为之酋长。
After Chieftain Shouzhong of Tujue was killed, Khagan Mochuo of Tujue withdrew his troops and Shouzhong's general Su Lu gathered the remaining men and made himself chief.