四分律行事鈔資持記 2.766

2.766

十八。（佛在羅閱城，大臣為跋難陀留食分，兒以五錢取食；跋難陀取錢寄市上，人譏故制。）名中。畜謂藏積，錢寶是八穢之一。

[Eighteenth.] (The Buddha was in Rājagṛha. A great minister saved a portion of food for Upananda, but his son took the food for five coins; Upananda took the coins and deposited them in the market, and people criticized him, so it was prohibited.) Regarding the designation: "holding" means hoarding and accumulating; money and jewels are one of the eight impurities.