《旧唐书·列传·卷六十九》
天宝十三年，玄宗御驾勤政楼，考试录用博通坟典、洞晓玄经、辞藻宏丽、军谋出众的贤人，命有关部门提供食物，天黑才结束。选取辞藻宏丽外，还加考诗赋各一首。
早孤家贫，养母以孝闻，甘旨或阙，忧见于色。
In the 13th year of Tianbao period, Emperor Xuanzong examined at Qinzheng Pavilion for men well-versed in classics and mysteries, eloquent, and with extraordinary military strategies. He ordered food to be served, and the examination lasted until nightfall. In addition to eloquence, all candidates were required to complete a poem and a fu.