一切經音義 1.171

1.171

鄔波尼殺曇分（梵語算法數之極也古人譯為因果不相似力勝也大論釋為微細分析至極之言也如析一毛以為百分又析彼一分為百千萬分又於所析微細分中如前析之乃至隣虛至不可析處名鄔波尼殺曇分）。

鄔波尼殺曇分 (Sanskrit [upaniṣad-bhāga], the ultimate limit of reckoning and numbers. Ancients translated it as cause and effect being incomparable in superior power. The Dazhidulun explains it as the ultimate expression of minute division: like dividing a single hair into a hundred parts, and then dividing one of those parts into hundreds, thousands, or tens of thousands of parts, and then dividing those minute parts again as before, down to the boundary of voidness where division is no longer possible—this is called an upaniṣad-bhāga).