四分比丘戒本疏 2.111

2.111

第三戒、有學白衣竭貧行施，乃至身肉法爾不悋。佛愍貧苦，制諸比丘作記識學家白二羯磨，防護五眾不聽受食。比丘故違，於如是學家食咽咽犯。或先疏請、或比丘病、或置地與比丘不犯者，令隨少分獲施福也。彼家還富，令從僧乞，解此羯磨，白二解之，廣如律辨。

The third precept: a layperson in training (śaikṣa) exhausts their poverty to practice generosity, even not begrudging their own flesh by nature. The Buddha, having pity on their impoverished distress, prohibited the bhikṣus by performing a motion-and-one-proclamation (ñattidutiya-kamma) to designate them a training household (śaikṣa-kula), protecting the five assemblies and not allowing them to receive food [there]. If a bhikṣu intentionally violates this, eating at such a training household is an offence with each swallow. If an invitation was previously extended, or if the bhikṣu is sick, or if it is placed on the ground and given to the bhikṣu, there is no offence, in order to allow them to obtain the merit of giving in some small measure. When that family becomes wealthy again, they are instructed to request the Saṃgha to revoke this formal act (karman); it is revoked by a motion-and-one-proclamation, as explained in detail in the vinaya.