《墨子·71章 杂守》
羊坽这种攻城方法是进攻的蠢法子，只会导致进攻一方士兵的疲劳，不足以构成对守城一方的危害。
羊坽者，攻之拙者也，足以劳卒，不足以害城。
The sheepfold siege method is a stupid method of attack, which will only lead to the fatigue of the attacking soldiers, and is not enough to constitute a threat to the defenders.