Sima Qian, Records of the Grand Historian"Hereditary House of the Grand Duke of Qi" quote: "於是周西伯獵，果遇太公於渭之陽，與語大說，曰：「自吾先君太公曰『當有聖人適周，周以興』。子真是邪？吾太公望子久矣。」故號之曰「太公望」，載與俱歸，立為師。" translation: "The Western Count of Zhou then went out hunting, and as a result met the Grand Duke [of Qi] on the Wei River's north bank, and talked [with the Grand Duke of Qi] and became greatly pleased, saying: "My lordly ancestor the Grand Duke himself had said: 'Just when one has a sage coming to/fit for Zhou, Zhou will prosper'. Are you truly that one? My Grand Duke had hoped for you long ago. [The Western Count] therefore called [the Grand Duke of Qi] 'Grand Duke's Hope', returned along with him in the same chariot, and honored him as teacher."
