《旧唐书·列传·卷九十》
提拔的心腹之人，遍布于朝廷的高位；暗中结纳圣上近臣，灾难就在萧墙之内。
树置腹心，遍于贵位；潜结左右，难在萧墙。
Their trusted followers have been appointed to high positions in the court, and they have also secretly befriended those closest to the emperor. Disaster looms within our own walls.