《资治通鉴·晋纪·晋纪三十》
有人劝说王恭趁前去朝见皇帝的机会，动用部队杀了王国宝。王恭因为豫州刺史庾楷兵马精壮强盛，他与王国宝结为死党，对他心存顾忌不敢冒然动手。
或劝恭因入朝以兵诛国宝，恭以豫州刺史庾楷士马甚盛，党于国宝，惮之，不敢发。
Someone persuaded Wang Gong to kill Wang Guobao with troops when he went to meet the emperor. Because Yu Kai, the governor of Yuzhou, had strong and powerful troops, and he was a close friend of Wang Guobao, he was afraid of him and did not dare to act rashly.