《后汉书·列传·张法滕冯度杨列传》
这时苍梧、桂阳狡猾的盗贼相聚，攻打郡县、贼人众多而杨璇兵力薄弱，官吏百姓非常担心害怕。杨璇于是特制马车数十辆，用一排袋子盛石灰于车上，系布索于马尾，又做兵车，专彀弓弩，约定日期会战。
是时苍梧、桂阳猾贼相聚，攻郡县，贼众多而璇力弱，吏人忧恐，璇乃特制马车数十乘，以排囊盛石灰于车上，系布索于马尾，又为兵车，专彀弓驽，克期会战。
At this time, the cunning bandits of Cangwu and Guiyang gathered to attack counties and towns, and the number of bandits was large while Yang Xuan's army was weak so the officials and people were very worried and afraid. Yang Xuan therefore specially made dozens of chariots, filled sacks with slaked lime, and put them on the carts, tying cloth cords to the horses' tails, and also made war chariots, specially equipped with bows and crossbows, and agreed upon a date for battle.