《宋书·列传·卷五十九》
元嘉二十九年，太祖想再次北伐，就此事征求大臣们的意见。何偃议论这事认为： 敌人终要灭亡，他们容易混乱，歼灭他们并非难事，这确实是天意。
二十九年，太祖欲更北伐，访之群臣，偃议曰： 内干胡法宗宣诏，逮问北伐。伏计贼审有残祸，犬羊易乱，歼殄非难，诚如天旨。
In the 29th year of Yuanjia, the Taizu wanted to launch another Northern Expedition, and asked the opinions of his officials on this matter. He Yan argued that: The enemy shall perish and they are prone to chaos; destroying them is not a difficult task, and it is truly divine will.