《资治通鉴·魏纪·魏纪三》
如今既然不能就地取粮，况且斜谷地势险阴，无论进退，都很困难。转运粮食肯定会被抄袭截击，如果多留士兵据守险要之处，便会使战士受损失，不可不深思熟虑！ 
今既无所因，且斜谷阻险，难以进退，转运必见钞截，多留兵守要，则损战士，不可不熟虑也。 
At this moment, we are not able to get food from the area, and besides, the terrain of the Xie Valley is dangerous and treacherous, it’s hard to advance and hard to retreat. The logistics of transferring the food will definitely be discovered and attacked, if we leave a lot of soldiers to guard this dangerous location, it will result in the loss of people, we cannot not put deep thought into all of this!