瑜伽論記 6.269

6.269

經行者：謂於廣長稱其度量乃至相應身業者，景云：可廣三步，長三十步許，是經行道。基師又解：西方多飲蘇乳，其食難消，為一處所量無大少，或露或隱，於中往來，擬行消食處所此中來去所有如法之身業也。

Regarding walking meditation: as for "in width and length commensurate with its measure..." up to "concordant bodily action," Jing says: "It can be about three paces wide and thirty paces long; this is the path for walking meditation." Master Ji also explains: "In the Western Regions, they drink much ghee and milk, which is difficult to digest. A place is arranged, without being too large or too small, either uncovered or sheltered, where one walks back and forth. Intended as a place to walk and digest food, coming and going within it constitutes all concordant bodily actions."