《旧唐书·列传·卷一百一十九》
十一月，郑注得知李训动手翦灭中官，自凤翔率亲兵五百余人奔赴京城。
十一月，注闻训事发，自凤翔率亲兵五百余人赴阙。
In November, Zheng Zhu learned that Li Xun had set out to wipe out the eunuchs. He led more than 500 of his own soldiers from Fengxiang to the capital.