仁王經疏 1.117

1.117

問：何故名遍處？《毘婆沙》云「由二緣故。一由無間，謂純青等勝解作意，不相間雜故。二由廣大，謂緣青等勝解作意，境相無邊，故名廣大。大德說曰：所緣寬廣，無有間隙，故名遍處。」《雜集論》曰「其量廣大，周普無邊，故名遍處。」具如別章。

Question: Why are they called "universal bases"? The Vibhāṣā says: "Due to two conditions: first, due to continuity, meaning resolute attention to pure blue and the rest without mutual intermixture; second, due to vastness, meaning that when resolute attention takes blue and the rest as its object, the aspect of the object is boundless; hence it is called 'vast.' The Venerable [Dharmatrāta] says: 'Because the object is wide and vast without gaps, it is called a universal base.'" The Samuccaya-vyākhyā says: "Its measure is vast, pervasive, and boundless; therefore it is called a universal base." The full account is as in the separate chapter.