大比丘三千威儀 2.25

2.25

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.