觀無量壽佛經義疏 3.96

3.96

「『圓光面各百二十五由旬，照二百五十由旬。』」百二十五由旬，計五千里。此即光體，照則倍之。二、身光，三：初、示色量；二、有緣得見；三、因光得名。初、示色量。

"‘The halo is one hundred and twenty-five yojanas on each side, and shines for two hundred and fifty yojanas.’" One hundred and twenty-five yojanas amounts to five thousand li. This is the body of the light itself; its illumination doubles it. Second, the body-light has three parts: first, indicating the color and measurement; second, being seen by those with affinity; third, obtaining a name because of the light. First, indicating the color and measurement.