《后汉书·列传·逸民列传》
龙不隐鳞，凤不藏羽，网罗高悬，去到何方，即使哭泣有什么用呢？ 
夫龙不隐鳞，凤不藏羽，网罗高县，去将安所？虽泣何及乎！ 
Dragons do not hide their scales, phoenixes do not hide their feathers, the net is hanging high, where can they go, even if they cry, what's the use? 