《资治通鉴·唐纪·唐纪四》
处罗可汗又打算取并州以安置杨政道，他部下群臣大多以为不可，处罗说： 我父亲丧失了国家，靠隋朝才得立为汗，如此大恩不能忘却。 
处罗又欲取并州以居杨政道，其群臣多谏，处罗曰： 我父失国，赖隋得立，此恩不可忘！ 
Chuluk Khan also planned to seize Bing Prefecture to settle Yang Zhengdao; most of his ministers thought this inadvisable, but Chuluk said: “My father lost his kingdom and only through the grace of the Sui was he able to establish himself as khan; I cannot forget such a great kindness.”