四分律行事鈔資持記 1.534

1.534

有場界中。言戒場者，受隨等法，多行於中；疏云：似世諸場，莫非聚結異品，收拾勝利故也。然圖中標為戒壇者，謂於場中別更封土。若據初開，未必有壇。所以律中約通從本，但云場耳。三標內外，尋圖可見。

In [the section on] boundaries having a precept site: As for the term "precept site," acts such as reception and subsequent practice are mostly performed within it; the Commentary says: "It is like worldly sites, where various classes of things are assembled and excellent benefits are gathered." However, what is marked in the diagram as a "precept platform" refers to separately mounding earth within the site. If based on the initial authorization, there was not necessarily an elevated platform. Therefore, the Vinaya speaks generally and adheres to the original, merely calling it a "site." The inside and outside of the three markers can be seen by examining the diagram.