《资治通鉴·唐纪·唐纪六十五》
夔王李滋，是唐宣宗第三个儿子，倍受父亲宠爱，唐宣宗想以他为皇嗣；因为李滋上有兄长，依照礼轮不到他当皇太子，所以唐宣宗久久不建东宫。
夔王滋，第三子也，上爱之，欲以为嗣，为其非次，故久不建东宫。
Li Zi, the Prince of Kui, was the third son of Emperor Xuanzong of Tang. He was much loved by his father, and Emperor Xuanzong of Tang wanted to make him the crown prince; because Li Zi had older brothers, it was not his turn to be the crown prince according to the rules of etiquette, so Emperor Xuanzong of Tang delayed the establishment of the East Palace for a long time.