《贞观政要·卷四·规谏太子》
太宗对两人的做法都很称赏，赏赐这两位大臣帛各五百匹，黄金各一斤。贞观十三年，太子右庶子张玄素因为太子李承乾喜欢打猎，荒废了学业，于是上书进谏，他说：
太宗并嘉纳之，二人各赐帛五百匹，黄金一斤，以励承乾之意。贞观十三年，太子右庶子张玄素以承乾颇以游畋废学，上书谏曰：
Taizong admired the practices of the two and rewarded the two ministers with 500 bolts of silk and 1 catty of gold each. In the 13th year of Zhenguan, Zhang Xuansu, the Zuo Shuzi of the Crown Prince, submitted a memorial to remonstrate because Crown Prince Li Chengqian loved hunting and neglected his studies. He said: