《太平广记·卷三百五十九·妖怪一》
到了嘉峪关，那双头鸡突然回头望着汉家的宫殿哀叫起来，象人言道，三七末，鸡不鸣，犬不吠，宫中荆棘乱相移，当有九虎争为帝。
至西关，鸡返顾，望汉宫而哀鸣，言曰：三七末，鸡不鸣，犬不吠。宫中荆棘乱相移，当有九虎争为帝。
When it arrived at Jiayuguan Pass, the two-headed chicken suddenly looked back at the palace of the Han Dynasty and wailed, As if saying, Three sevens are up, the chicken will not crow, the dog will not bark, weeds and thorns will grow wildly in the palace, and nine tigers will fight for the throne.