《旧唐书·列传·卷一百零九》
崔群屡次上疏奏其奸邪，因此曾对皇上面论，语及开元、天宝间事，崔群道： 安危在于出令，存亡系于所任。
尝因对面论，语及天宝、开元中事，群曰： 安危在出令，存亡系所任。
Cui Qun repeatedly accused him of奸邪(treachery) in memorials, therefore, he had talked to the emperor about this, referring to the matters that happened during the Kaiyuan and Tianbao eras. Cui Qun said: “Safety and danger depend on giving orders, and existence and destruction depend on those appointed.