《旧唐书·本纪·卷十八》
十多岁时，害了重病，越来越沉重，忽然有光辉照耀其身，便马上一跃而起，端正身体拱手作揖，像对待臣下一样，奶母认为是心病，穆宗看他后，抚摸着他的背说： 这孩子是我家英明人物，不是心病。 
十余岁时，遇重疾沈缀，忽有光辉烛身，蹶然而兴，正身拱揖，如对臣僚。乳媪以为心疾。穆宗视之，扶背曰： 此吾家英物，非心惫也。 
When he was in his teens, he suffered from a serious illness, which became increasingly serious. Suddenly, a beam of light shone on his body, and he immediately jumped up, straightened up, and cupped his hands in a salute, as if to treat his servants. The wet nurse thought it was a psychological illness, but after Mu Zong saw him, he patted him on the back and said: "This child is a brilliant figure in my family. It's not a psychological illness."