In a dream, King Munmu and the famous general Kim Yu-shin appeared to King Sinmun and said to him: "Blowing on a bamboo flute will calm the heavens and the earth."
Di dalam suatu mimpi, Raja Munmu dan jenderal terkenal Kim Yushin muncul di hadapan Raja Sinmun dan berkata padanya: "Meniup seruling bambu akan menenangkan langit dan bumi."