《旧五代史·后唐·列传二十五》
这时豆卢革以手书趁便借了几十万库钱，孔谦拿手书给郭崇韬看，并稍微暗示豆卢革。
时革以手书便省库钱数十万，谦以手书示崇韬，亦辞避。
At that time, Doulu Ge conveniently borrowed hundreds of thousands of treasury money by his handwritten letter. Kong Qian showed the handwritten letter to Guo Chongtao and hinted at Doulu Ge.