《孙膑兵法·地葆》
渡河涉水，向山陵进发，处在河流下游，在死地扎营驻守，靠近树林，在这五种情况下，都容易招致失败，用兵时要特别注意。
绝水、迎陵、逆流、居杀地、迎众树者，钧举也，五者皆不胜。
Crossing a river to camp in low-lying land; going downstream into a dead zone; camping in a forest; and failing to protect all sides: these five situations all easily invite defeat and require extra caution in military strategy.