《旧唐书·本纪·卷十六》
十二月初五，皇上在紫宸殿躺在大绳床上接见百官，李逢吉上奏说景王已经长大，请求册立景王为皇太子，左仆射裴度又极力讲这件事。
辛卯，上于紫宸殿御大绳床见百官，李逢吉奏景王成长，请立为皇太子，左仆射裴度又极言之。
On December 5, the emperor received hundreds of officials while lying on a big rope bed in Zichen Hall. Li Fengji reported that King Jing had grown up. He requested to establish King Jing as the crown prince. Zuo Pushe Pei Du also strongly urged this matter.