《明史·列传·卷一百五十七》
承畴打算入关征讨，就把各位将领都召集来，命令他们分守汝州、雒南的各处要害。
承畴将入关征讨，乃大会诸将，令分防汝、雒诸要害。
Chengchou planned to enter the pass to fight, and summoned all the generals to order them to guard various key points in Ruzhou and Luonan.