《旧唐书·本纪·卷四》
夏四月十四日，皇上驾到安福门，观里僧人玄奘迎接皇上亲自书写并制好的慈恩寺碑文，用古印度佛教法规导从，慈恩寺佛徒很多。
夏四月戊申，御安福门，观僧玄奘迎御制并书慈恩寺碑文，导从以天竺法仪，其徒甚盛。
On April 14th, the emperor arrived at the Anfu Gate, where he received the monk Xuanzang from Li Temple. The emperor personally wrote and revised the inscription of Ci'en Temple, guided by the rules of ancient Indian Buddhism. There were many Buddhists in Ci'en Temple.