《新唐书·列传·卷一百四十三》
存信已迫近魏城，克用与之合力。罗弘信派捉生迎战，败。克用追及外城，破城后回。
存信已傅魏城，克用并力，罗弘信以捉生逆战，为克用所败，追及郛，叩阖而还。
Cun Xin had already gotten close to Wei City, and Ke Yu joined forces with him. Luo Hong Xin sent Zuo Sheng to fight and they were defeated. Ke Yu pursued to the outside of the city, and returned after breaking through the city.