《资治通鉴·后周纪·后周纪二》
契丹瀛州、莫州、幽州发大水，流民进入边塞散居河北的有数十万人，契丹各州、县也不加禁止。
契丹瀛、莫、幽州大水，流民入塞散居河北者数十万口，契丹州县亦不之禁。
Yingzhou, Mozhou, and Youzhou in Khitan had a great flood. Hundreds of thousands of refugees entered the border and lived in Hebei. Khitan's states and counties made no effort to stop them.