四分律比丘含注戒本 2.788

2.788

The Buddha was in Śrāvastī. It is the regular practice of the Buddhas, when not accepting an invitation, to inspect the dwellings everywhere. Seeing the bedding of the saṃgha spread on the open ground and soiled with impurities, he told the bhikṣus: "Even non-Buddhist seers who have abandoned desire do not do this. I permit you to make a niṣīdāna to protect your robes and protect your bedding." The Group of Six made them oversized; the bhikṣus reported the fault, and the Buddha accordingly formulated the precept.