四分律刪繁補闕行事鈔 1.121

1.121

Second, explaining the araṇya: Broadly speaking, there are many kinds of araṇya: namely, for dhūta, for depositing robes, regarding the stealing precept, the saṃgha boundary, the robe boundary, and times of danger. For now we explain the saṃgha boundary; the others will be explained below in due course. As for a single araṇya boundary, the various schools are not uniform; most say that the saṃgha boundary extends for one krośa (the commentary to the Vinayavibhāṣā states: 'the distance of one drum sound'). The Za baozang [jing] translates this as five li, and tradition takes this as the standard. If there is danger, as the Samantapāsādikā states: 'An araṇya boundary is at minimum seven abbhantaras square or circular, one abbhantara being twenty-eight cubits.' If someone does not agree, ritual acts may be performed outside it. By calculation, there are 196 cubits; each cubit being one foot eight inches, making a total of fifty-eight paces, four feet, and eight inches.