《旧唐书·列传·卷一百三十四》
在此之前，每次宴毕，其必出宫回营，这天却有诏留之。
累迁至右卫大将军，知内侍省事。
Previously, each time after the feast, he would always leave the palace and return to the camp. This day, however, he was kept by an imperial edict.