《资治通鉴·宋纪·宋纪十四》
慕容白曜将要进攻肥城，郦范说： 肥城虽然很小，但攻打起来，很费时间，胜了他不能增加我们的声势，失败则有损于我们的军威。
白曜将攻肥城，郦范曰： 肥城虽小，攻之引日，胜之不能益军势，不胜足以挫军威。
Murong Baiyao was about to attack Feicheng, Li Fan said: Feicheng is very small, but it takes a lot of time to attack, and it will not increase our momentum even if we win, but it will damage our military prestige if we lose.