《资治通鉴·唐纪·唐纪五十四》
这便是我为陛下痛切惋惜的第二点 现在天气已经炎热，士兵身上的热气互相蒸熏，至于饥饿干渴，疲乏劳累，瘟疫流行，露天而处，驱赶着他们去参加战斗，人们怎么能够经受得住呢！
此为陛下痛惜者二也。今天时已热，兵气相蒸，至于饥渴疲劳，疾疫暴露，驱以就战，人何以堪！
This is the second point of my deep regret for Your Majesty. Now that the weather has grown hot, soldiers' bodies are covered in heat rash. As for hunger, thirst, fatigue, plagues, and having to live out in the open, how can anyone endure driving them to fight?