《汉书·传·霍光金日磾传》
臣刘旦愿交还燕王的符节玺印，入朝值宿守卫，审察奸臣的阴谋。 
臣旦愿归符玺，入宿卫，察奸臣变。 
Subject Liu Dan is willing to return the King of Yan's symbol of authority and seal, come to the court for overnight duty to guard, and investigate the traitor's plots.