《资治通鉴·唐纪·唐纪五十六》
癸酉，李进诚再次攻打牙城，火烧牙城的南门，百姓争着背来柴草帮助官军，射向城上的箭象刺猥毛一样密集。
癸酉，复攻之，烧其南门，民争负薪刍助之，城上矢如胃毛。
On the day of Guiyou, Li Jincheng attacked Yacheng again, burning the south city gate of Yacheng, and the locals vied to carry firewood to help the government army, shooting arrows at the enemy on the city wall as densely as porcupine quills.