續一切經音義 6.108

6.108

踰繕那（上羊朱反次音善梵語也或云踰闍那古云由旬皆訛略也正云踰繕那即上古聖王軍行一日程也諸經論中互說里數不同或云四十里或云三十里或唯十六里蓋以或聖王行有遲速或取肘量或以古尺雖各有異見終是王軍一日行程也案西域記三十里為定以玄奘法師親考遠近撰此行記𱝔對太宗皇帝所問其言不謬矣）。

Yojana (踰繕那: the upper character has the fanqie *yáng* + *zhū* [yú]; the second character is pronounced *shàn*. This is Sanskrit; also rendered as *yúshénà*; anciently called *yóuxún*, which are all corruptions and abbreviations. Correctly it is *yúzhànnà*, which is a single day's march of an ancient sage-king's army. Various sūtras and treatises differ in their accounts of its mileage: some say forty *li*, some say thirty *li*, and some say only sixteen *li*. This is perhaps because sage-kings marched fast or slow, or because the cubit used differed, or according to ancient standard feet; although there are divergent opinions, in the end it represents a single day's journey for a royal army. According to the *Xiyu ji*, thirty *li* is settled as definitive; since Dharma Master Xuanzang personally verified distances and composed this travelogue to answer the inquiries of Emperor Taizong, his words are surely not mistaken).