《资治通鉴·晋纪·晋纪十三》
张敬部到达东平，徐龛怀疑他是来袭击自己，于是将王伏都等三百多人斩首，又向东晋请降。
张敬至东平，龛疑其袭己，乃斩伏都等三百馀人，复来请降。
Zhang Jingbu arrived at Dongping, Xu Kan suspected that he had come to attack him, so he beheaded Wang Fudou and over 300 others, and then he requested to surrender to Eastern Jin.