世為無上之福田者有八種，以八種之金屬譬無價之真寶。八種者金、銀、鍮石、假寶、赤白銅鐵、白鑞、鉛、錫也。大集經五十五曰：「譬如真金，為無價寶；若無真金，銀為無價；若無銀者，鍮石為無價；若無鍮石，偽寶為無價；若無偽寶，赤白銅鐵、白鑞、鉛、錫為無價寶。如是一切諸世間中，佛寶為無上；若無佛寶，緣覺為無上；若無緣覺，羅漢為無上；若無羅漢，諸餘聖眾為無上；若無聖眾，得定凡夫為無上；若無得定，淨持戒者為無上；若無淨戒，污戒比丘為無上；若無污戒，剃除鬚髮、身著袈裟、名字比丘為無上寶。比餘九十五種異道最尊第一，應受世供為物福田。」末法燈明記曰：「如所引大集所說八重真寶，是其證也。」
The eight weighty and truly precious things, i.e. the eight metals, which depend for evaluation on gold, the highest and greatest, used to illustrate the Buddha as supreme and the other classes in grades beneath him. Also 八重無價, i.e. the eight priceless things.