《资治通鉴·魏纪·魏纪九》
于是到处放风行反间之计，扬言说： 吴国救兵就要到了，魏国的大军缺乏粮食，要分散派遣病弱的士卒到淮北去吃那里的粮食，看形势围攻不会太久了。 
乃纵反间，扬言 吴救方至，大军乏食，分遣羸疾就谷淮北，势不能久 。
So they spread rumors to sow dissension, claiming hat reinforcements of Wu would soon arrive, the Wei troops were short of food, and the sick and weak soldiers would be sent to the north of Huaihe River to get food. In this way, it seemed the siege would not last long.