佛祖統紀 48.8

48.8

理宗（嘉定十四年。詔以太祖下十一世與莒。賜名貴誠。立為皇弟沂靖惠王。後十七年封成國公。受遺詔即帝位。正月五日天基節）

Emperor Lizong (In the fourteenth year of Jiading, by imperial decree, Zhao Yuju, an eleventh-generation descendant of Taizu, was granted the name Guicheng and established as Imperial Younger Brother, Prince Jinghui of Yi. Seventeen years later, he was enfeoffed as Duke of Chengguo. Receiving the testamentary decree, he ascended the imperial throne. The fifth day of the first month was the Tianji Festival).