梵網經菩薩戒本疏 5.50

5.50

二、次第者，前即防畜戰殺之具，今則止彼身為戰，使次辨也。

Second, the sequence: The preceding [precept] guarded against keeping implements of warfare and slaughter, while this one stops one's own person from serving as a military envoy; thus it is explained next.