四分律刪繁補闕行事鈔 3.130

3.130

三處分淨者。《四分》：若檀越、若經營比丘，為僧作伽藍時，分處如是言：「某處為僧作淨地。」《僧祇》：若作新住處，營事比丘及僧未住，初夜前，以繩量度分齊，爾許僧住，爾許淨屋，受之；不得過初夜（《四分》經明相）。若檀越言，莫預處分，我未施僧，此則同他物淨。《五分》作新住處，未有淨屋，當先指某處作淨地，以食置中，然後僧住；若經明相出，則不成。《善見》：云何結淨屋？初竪柱時云：「此處為僧作淨屋。」三說已，乃竪之。餘者亦爾；不爾，就一柱上加法亦成。若已成者，喚本主，語令隨指一處，為僧作淨屋；若無者，聚落有老宿，召來遣作；不解者，教之。

The third is purity by assignment: The Dharmaguptaka Vinaya states: When a dānapati or an administrative monk constructs a saṃghārāma for the saṃgha, he designates the place in this way, saying, 'Such-and-such a place is made pure ground for the saṃgha.' The Mahāsāṃghika Vinaya states: When constructing a new dwelling, before the administrative monk and the saṃgha have taken up residence, before the initial watch of the night, measure out the dimensions with a cord: 'This much is for the saṃgha's residence, and this much is a pure house,' and receive it; it must not exceed the initial watch of the night. (The Dharmaguptaka Vinaya specifies the appearance of dawn.) If the dānapati says, 'Do not assign it beforehand; I have not yet donated it to the saṃgha,' this is identical to purity by another's property. The Pañcavargika Vinaya states: When constructing a new dwelling where there is not yet a pure house, one should first point out such-and-such a place to make a pure ground, place the food inside, and only then may the saṃgha reside there; if it passes the emergence of the marks of dawn, it is invalid. The Samantapāsādikā states: How does one demarcate a pure house? When first erecting a pillar, one says, 'This place is made a pure house for the saṃgha.' Having spoken this three times, one then erects it. The others are also like this; if not like this, performing the procedure upon a single pillar is also valid. If it is already completed, call the original owner and tell him to designate a place at will to serve as a pure house for the saṃgha; if there is none, if there is a senior elder in the settlement, summon him and have him do it; if he does not understand, instruct him.