瑜伽論記 14.421

14.421

十門第十明離門，景云：欲界色疎，色界大種補在身內，如水入沙，處所不異以性類別，故非同處不相離也，彼是相離不相離義。然相離不相離多就同地始終同聚報長養色，此上界繫色住欲界身中故，非是相離不不相離義。

The tenth gate among the ten gates explains the gate of separation. Jing says: "Form in the desire realm is coarse and sparse; the great elements of the form realm make up the interior of the body, just as water enters sand. The locations are not different, yet because their kinds of nature are distinct, they are not inseparable in the same locus; that is the meaning of being separated and not inseparable. However, separated and inseparable mostly refer to the retributive and nourished forms belonging to the same stage from beginning to end in the same aggregation. Because these forms bound to the higher realms abide within the body of the desire realm, this is not the meaning of separated and inseparable."