《后汉书·列传·南匈奴列传》
呼衔氏为左，兰氏、须卜氏为右，他们负责判决案件，受理诉讼，他们将判决的轻重，口头告诉单于，那裹没有文书和记事的簿册。
呼衍氏为左，兰氏、须卜氏为右，主断狱听讼，当决轻重，口白单于，无文书簿领焉。
Huhanxie was made Left, and Lan and Xubu Right, in charge of trials and appeals, and reported the severity of the sentences orally to the Chanyu, with no written documents or records.