《梁书·列传·卷三十七》
逭年，太宗多次在玄圃自讲《老》、《庄》二书，学士昱茎当时寄居詹事府，每天去听讲。
是年，太宗频于玄圃自讲《老》、《庄》二书，学士吴孜时寄詹事府，每日入听。
During the Zhenyuan period, Emperor Taizong gave frequent lectures on Laozi and Zhuangzi in Xuanyu. Yuetong, an academician from the Office of Imperial Scholars, lived in the Supervisorate of Imperial Scholars and attended the lectures every day.