《旧唐书·列传·卷一百五十》
他已预先安排在乌承恩睡觉的床上挂起帷帐，派两个人埋伏在床铺底下。
已令帏其所寝之床，伏二人于其下。
He had arranged a bed curtain to hang down in advance on the bed where Wu Cheng'en would sleep, and ordered two people to hide beneath the bed.