四分律行事鈔資持記 2.816

2.816

二十。（佛在舍衛，跋難陀往無住處村，以生薑易食；又共外道博衣，悔而不還，譏訶因制。）戒名。準疏分三：為利故收，為利故出，諍語而高，為販也。為利而取，故減前價，名買也。為利故出，強增價而高，曰賣也。（販但先收犯還同賣。）

Twenty. (When the Buddha was in Śrāvastī, Upananda went to a village without fixed dwellings and traded raw ginger for food; furthermore, he bartered robes with an outsider, regretted it, and did not return it; because of criticism and reprimand, it was prohibited.) The name of the precept: according to the commentary, it is divided into three: collecting for profit, releasing for profit, and wrangling over a high price is 'commercial trading' (販). Taking for profit, thereby reducing the previous price, is called 'buying' (買). Releasing for profit, forcefully raising the price to make it high, is called 'selling' (賣). (Commercial trading merely collects first; the offense of returning it is the same as selling.)