《资治通鉴·晋纪·晋纪三十四》
姚兴如果来，一定会从汾水的西岸，直接逼临柴壁，倘若这样，敌军的声势互相呼应连接，那么我们设下的重重围障再坚固，也不能把他们制服。
兴来，必从汾西直临柴壁；如此，虏声势相接，重围虽固，不能制也。
If Yao Xing comes, I will definitely attack Chai Bi directly from the west bank of the Fen River. If this is the case, the enemy's momentum will echo each other and connect with each other, so no matter how strong our multiple barriers are, they will not be able to defeat them.