《旧唐书·本纪·卷八》
景龙四年四月，中宗驾幸他的府第，因而在他的池中游玩，在楼船上结彩，让大象踩船划动。
四年四月，中宗幸其第，因游其池，结彩为楼船，令巨象踏之。
In April of the fourth year of Jinglong, Zhongzong visited his palace, and so he played in the pool, painted his pleasure boat, and had elephants tow the boat across the waters.