《尉缭子·兵令上》
布阵通常是面向敌人的，但根据情况也有向内的，也有向外的，有立阵，也有坐阵。
乱先后，斩之。常陈皆向敌，有内向，有外向，有立陈，有坐陈。
Battle formations are usually facing the enemy, but depending on the situation, there are also formations facing inward and outward, some standing formations, and some seated formations.