一切經音義 12.72

12.72

日蝕（音食李淳風乙巳占曰夫日蝕依常度者月來掩也日行遲一日行一度一月行二十九度有餘月行疾二十七日半一周天二十九日追及日之時與日同道月在於內映日故見蝕也）。

日蝕 Pronounced shí [shí]. Li Chunfeng's Yisi zhan says: "As for solar eclipses following regular celestial motions, it is the moon coming to obscure [the sun]. The sun moves slowly, travelling one degree in one day, and twenty-nine degrees and more in one month. The moon moves swiftly, completing one circuit of the heavens in twenty-seven and a half days. When it catches up with the sun in twenty-nine days, it shares the same path with the sun; the moon is on the inside and obscures the sun, hence an eclipse is seen."