《汉书·传·外戚传下》
这时候楚思王刘衍、梁王刘立前来朝见，第二天一早就要告辞回去，成帝就摆设帷帐住在白虎殿。
是时，楚思王衍、梁王立来朝，明旦当辞去，上宿供张白虎殿。
At that time, Prince Chu Si Liu Yan and King Liang Liu Li came to pay respect to Emperor Cheng and intended to bid farewell and leave the following morning, when Emperor Cheng ordered that quarters be set up at White Tiger Hall.