《明史·本纪·卷五》
二十五日，何福等宿营灵壁，燕军阻拦其饷道，迫使平安分兵六万人保护。
丁丑，何福等营灵璧，燕遮其饷道，平安分兵六万人护之。
On the 25th, He Fu and others camped in Lingpi, the Yan army blocked their food supply route, forcing Ping An to divide 60,000 troops to protect it.