《旧唐书·列传·卷三十六》
总章元年二月，举行入学的释乐礼，建成学馆，因此请求赠颜回太子少师，曾参太子少保。高宗都同意了。
总章元年二月，亲释菜司成馆，因请赠颜回太子少师，曾参太子少保，高宗并从之。
February 1, Zongzhang 1, the ceremony to accept students, Raku-rei, was held, and the school house was completed, so a request was made to grant Yan Hui the title "Junior Tutor to the Crown Prince" and Zeng Can the title "Junior Protector to the Crown Prince." Emperor Gaozong agreed to both requests.