四分比丘戒本疏 2.25

2.25

第十九、貿寶戒。謂以寶物展轉相貿，對於七眾皆悉是犯，自作教人並皆是犯。文言「賣買」者，即相貿之異名也。准《多論》說淨已相貿，犯也。捨懺同前戒應知。

The nineteenth precept: on trading in treasures. This refers to trading treasures back and forth; committing this with respect to any of the seven assemblies constitutes an offence, and doing it oneself or instructing others to do it all constitute offences. The text's phrase “buying and selling” is simply an alternate name for trading back and forth. According to the *Sarvāstivāda-śāstra*, trading them back and forth after performing vikalpana still constitutes an offence. The forfeiture and confession should be understood as being identical to the preceding precept.