《新五代史·列传·周家人传第八》
出师很久一无所获，又碰上酷暑大雨，皇后忧虑成疾而死去。
师久无功，遭大暑雨，后以忧成疾而崩。
After a long time on campaign, he had not achieved any success, and he encountered extreme heat and heavy rain. The Empress worried herself sick and died.