《旧五代史·后唐·庄宗纪一》
武皇满满地喝了一杯酒，捋着胡须指着庄宗说： 老夫壮心不已，二十年后，这孩子必将在此作战。 
武皇引满，捋须指帝曰： 老夫壮心未已，二十年后，此子必战于此。 
Emperor Wu drank a glass of wine and stroked his beard, pointing to Zhuangzong and saying: "I am still ambitious. Twenty years later, this child will definitely fight here."