法苑珠林 1.28

1.28

依奘法師西國傳云。夫數量之稱謂踰繕那（舊云由旬。又曰踰闍那。又曰由延。皆訛略）踰繕那者。自古聖王一日運行也。舊傳一踰繕那四十里矣。印度國俗乃三十里。聖教所裁唯十六里。故毘曇論。四肘為一弓。五百弓為一拘盧舍。八拘盧舍為一由旬。一弓長八尺。五百弓長四百丈。四百丈為一拘盧舍。一里有三百六十步。一步有六尺。合有二百一十六丈為一里。二里有四百三十二丈。計前五百弓有四百丈為一拘盧舍。猶欠三十二丈不滿二里。計一拘盧舍減有二里。計八拘盧舍減十六里為一由旬。若依雜寶藏經。一拘盧舍有五里。計毘曇八拘盧舍為一由旬。合有四十里。

According to Master Xuanzang’s *Record of the Western Regions*, "The term for linear measure is called yojana (formerly written youxun, also yujiana, also youyan, all of which are corrupt abbreviations). A yojana is the distance a holy cakravartin king marched in a single day from antiquity. Former traditions say that one yojana is forty li. Indian secular custom takes it as thirty li. That established in the sacred teachings is only sixteen li." Therefore, the *Abhidharma* states that four cubits (hasta) make one bow (dhanus); five hundred bows make one krośa; eight krośas make one yojana. One bow is eight chi in length; five hundred bows are four hundred zhang in length. Four hundred zhang make one krośa. One li has three hundred and sixty paces; one pace is six chi; combined, there are two hundred and sixteen zhang to one li. Two li have four hundred and thirty-two zhang. Calculating the previous five hundred bows as four hundred zhang for one krośa, it falls short by thirty-two zhang of completing two li. Calculating one krośa as slightly under two li, eight krośas calculate to slightly under sixteen li for one yojana. If based on the *Saṃyuktaratnapiṭaka-sūtra*, one krośa is five li; calculating by the eight krośas of the *Abhidharma* to make one yojana, it totals forty li.