佛祖歷代通載 13.56

13.56

（四十一）　五月。逆賊安祿山陷長安。玄宗幸蜀。或謂車駕入蜀之初。有守臣與祿山偕反者。其人曾為閬守。有畫像在路次。玄宗忽見之不勝大怒。命侍臣。以劍斬像首。其人時在陝西。不覺其首無故忽墮于地。及是駕至成都渡萬里橋。悟一行金合當歸之讖。於是洗然忘憂云。

(Forty-one) In the fifth month, the rebel bandit An Lushan captured Chang'an. Xuanzong fled to Shu. Some say that when the imperial carriage first entered Shu, there was a regional official who had joined Lushan's rebellion. This man had once served as governor of Langzhou, and his portrait hung by the roadside. Xuanzong suddenly saw it, fell into an uncontrollable rage, and commanded an attendant official to cut off the head of the portrait with a sword. At that time, the man was in Shanxi; without his knowing it, his head suddenly fell to the ground for no reason. When the imperial carriage arrived at Chengdu and crossed the Wanli Bridge, [Xuanzong] understood Yixing's prophecy of the 'gold box' and the 'dāngguī' [tribute/return]. Thereupon he was cleansed of all distress and forgot his sorrows, so it is said.