一切經音義 27.105

27.105

金（說文五色金黃之為長久埋不生百鍊不輕從革不違西方之行生於土故從土左右點象金在上中之形今聲也應為金字也）。

Gold (jin): (The Shuowen says: "Of the five colors of metals, yellow is the chief. Buried for long it does not spoil; smelted a hundred times it does not lighten; it conforms to transformation without resistance. It belongs to the phase of the West. It is born of earth, hence it follows 'earth' [土]; the dots on left and right depict the form of gold in the earth. Jin [今] is the phonetic." It should be written as 金).