The third chapter of the Nissaggiya of the Vinaya Pitaka.
The third section of the Parivāra of the Vinaya Pitaka.
Eight reasons for which the Order is entitled to turn their begging bowls upside down (as a mark of censure), or to hold them up (showing their good will) on entering a layman's house. A.iv.344f.
The Buddha was once preaching a sermon to the monks on the five upādānakkhandhā, and Māra, wishing to disturb their thoughts, appeared in the shape of a bullock and wandered about among the bowls which had been placed to dry. But he was recognized and had to retire discomfited. S.i.112f.