四分律比丘含注戒本 1.510

1.510

若已成金、未成金、已成未成金，銀亦三種，錢唯一種，交互相易。錢者八種，金、銀、銅、鐵、白鑞、鈆錫、木錢、胡膠八種錢也。

whether wrought gold, unwrought gold, or wrought-and-unwrought gold, silver likewise in three kinds, and coin in only one kind, exchanging them with one another. Coins are of eight kinds: gold, silver, copper, iron, pewter, lead-tin, wooden coins, and sealing-wax—eight kinds of coins.