《宋书·志·卷二十七》
吕尚外出游历，看见赤人从雒水中出来，授给吕尚书文说： 命令吕尚辅佐姬昌的就是你。 
尚出游，见赤人自雒出，授尚书曰： 命曰吕，佐昌者子。 
Lü Shang went out to travel and saw a red man coming out of the Luoshui River, who gave Lü Shang a written document and said: The one who ordered Lü Shang to assist Ji Chang is you.