《旧五代史·后梁·列传三》
趁机带着自己的部众紧急赶赴占领衙城，徐知训的党徒已关闭了城门，只有朱瑾一人入城，与衙兵交战，朱瑾只得翻越城墙而出，摔坏了脚，又找不到马匹，于是用剑自杀，他的尸体被抛在街市上，盛夏而不生苍蝇蛆虫，徐温令把他丢到江里，他的部下暗中捞起埋葬了他。
马令《南唐书》云：知训因求马于瑾，瑾不与，遂有隙。俄出瑾为静淮节度使。瑾诣知训别，且愿献前马。
Taking the opportunity to lead his subordinates to the yamen urgently, Xu Zhixun's party had closed the city gate, only Zhu Jin entered the city, and fought with the yamen soldiers, Zhu Jin had to climb over the city wall and break his foot, and failed to find a horse. So he committed suicide with a sword, and his body was thrown into the street market, and it was midsummer without flies and maggots. Xu Wen ordered him to be thrown into the river, and his subordinates secretly picked him up and buried him.