四分律刪繁補闕行事鈔 2.161

2.161

Fourth, the gravity of trading. If one trades robes with these eight, one commits a forfeiture [offense]. If with robes one obtains treasures or cotton rugs, it is also a forfeiture; if one obtains the remaining six, both incur duṣkṛta. If one exchanges robes and treasures with each other, both are pāyattika; trading the other six kinds incurs duṣkṛta. If the six are traded among themselves, all are duṣkṛta; whoever obtains robes or treasures commits pācittika/pāyattika. This refers to transactions with laypeople involving an increase or decrease; [trading] with members of the five assemblies incurs a minor offense. The Sarvāstivāda-vinaya-vibhāṣā says: 'If one has declared pure the coins and treasures, and later trades them for robe-cloth to make the three robes and alms-bowl utensils that enter into the reckoning of the hundred and one items, it is not necessary to declare them pure; beyond this, one must declare them pure. If one commits an offense, one repents within the saṃgha; having already used coins and treasures to trade for robe-cloth and the hundred and one items, one need not forfeit them, because they have already entered into purity. Beyond this, whether they are finished robes or unfinished robes, declaring them all pure incurs no offense.'