俱舍論頌疏論本 22.28

22.28

釋曰：身器清淨略由三因：一身心遠離、二喜足少欲、三住四聖種。具身心遠離者，身遠離者離相雜住，心遠離者離不善尋。

Explanation: The purification of the bodily vessel is briefly due to three causes: first, physical and mental detachment; second, contentment and having few desires; third, abiding in the four noble lineages. "Possessing physical and mental detachment": physical detachment means being detached from mixed dwelling; mental detachment means being detached from unwholesome applied thoughts.