大比丘三千威儀 2.25

2.25

復有五事：一者左右手不得有所携持、二者不得大呼有所求索、三者授人鉢當視上下相前人、四者授鉢當右手撫上、五者當護所受。

There are further five matters: first, the left and right hands must not carry anything; second, one must not shout loudly demanding anything; third, when handing the pātra to someone, one must observe the order of seniority in front of oneself; fourth, when handing the pātra, one should stroke the top with the right hand; fifth, one should protect what has been received.