《新唐书·列传·卷一百四十二》
回纥留在京师的一些兵众，在坊市掠人子女，引骑兵冲撞含光门。皇城都闭门，诏令刘清潭前去劝止。
回纥之留京师者，曹辈掠女子于市，引骑犯含光门，皇城皆阖，诏刘清潭慰止。
Some Uyghur soldiers who stayed in the capital raided boys and girls in the market and led cavalry to charge Hangguangmen. The imperial city was closed, and Liu Qingtan was ordered to go and persuade them to stop.