《旧唐书·本纪·卷七》
二十一日，皇上驾到安乐公主山亭，宴请侍臣、学士，赐给他们绸缎各有等级差别。
乙巳，幸安乐公主山亭，宴侍臣、学士，赐缯帛有差。
On the 21st, the emperor arrived at Princess Anle's villa, hosted a banquet for ministers and scholars, and gave them different grades of silk.