《旧五代史·其它·外国列传一》
清泰三年，晋高祖被张敬达等进攻包围很急，派指挥使何福带着书表向契丹请求救兵，愿意做契丹的臣子。
清泰三年，晋高祖为张敬达等攻围甚急，遣指挥使何福赍表乞师，愿为臣子。
In the third year of Qingtai, Gaozu of Jin was surrounded and attacked by Zhang Jingda and others. He sent the commander-in-chief He Fu to the Khitan to request reinforcements, willing to become a vassal of the Khitan.