《新唐书·列传·卷八十八》
到韦长来了，竟对他说： 替我报告宰相，徐州专门杀害李听的亲信部下，除非任用高蠫镇守徐州，否则不能安宁。 
及长至，乃曰： 为我白宰相，徐州专杀李听亲吏，非用高瑀不能安。 
When Wei Chang arrived, he actually said to him: Tell the Prime Minister for me, Xuzhou specifically kills Li Ting's close subordinates, and if Gao Ku isn't appointed to guard Xuzhou, there will be no peace.