《元史·列传·卷三十五》
濮州城民因而幸免于死者数万人。其后在曹州、楚丘、定陶、上党诸地也是一样。当时，蒙古军由武关出襄阳、邓州。严实在徐州、邳州之间，以为大军破河南，杀戮必多，便载一些金银缎匹去赎人命，并且约束诸将，不准妄有杀掠。灵壁一县，蒙军要屠杀五万人，严实把他们都救了出来。
辛亥，其兄忠济授以东平人匠总管，遥领单州防御使事。乙卯，充东平路管军万户。
The life of tens of thousands of the citizens of Puyang was saved as a result. The same thing happened later in Caizhou, Chuyu, Dingtao and Shangdang. At the time the Mongol army emerged from the Wuguan Pass and took Xiangyang and Dengzhou. Yan Shi was stationed between Xuzhou and Pizhou, and predicted that the army would kill many people after breaking through Henan, so he took some gold, silver, satin and cloth to ransom human lives, and ordered his generals not to slaughter at will. The Mongols were going to massacre 50,000 people in Lingbi County, but Yan Shi rescued all of them.