《隋书·列传·卷二十六》
云定兴先得到女儿昭训的明珠络帐，私下送给宇文述，从此后几次一起游玩。
定兴先得昭训明珠络帐，私赂于述，自是数共交游。
Yun Dingxing first obtained his daughter’s Imperial Concubine Zhaoxun’s canopy with pearl netting, and secretly gave it to Yuwen Shu, and from that day on, they frequently went on excursions together.