四分律刪繁補闕行事鈔 2.213

2.213

As for individual alms-begging, the Samantapāsādikā provides four permutations: first, four people begging together, or begging separately without knowing about each other, because it is from the same host, receiving food at the same time commits an offense. The Sarvāstivāda-vinaya-vibhāṣā states: 'If four people each beg for food on their own and are together in one place, there is also no fault, because it is not from a single household.'