金剛經纂要刊定記 7.131

7.131

大雲下。二、引大雲解。生滅心行即有所得分別取相，今既不以，即與如合，故曰如如。上如即似義，下如即真如，似於真如故曰如如。

"Dayun, etc.": second, citing Dayun's explanation. Mental activities of arising and ceasing involve grasping at marks with conceptual differentiation that attains something. Now, since one does not rely on them, one accords with tathatā; hence it is called "like tathatā" (ru-ru). The upper ru means resemblance; the lower ru is tathatā. Resembling tathatā, it is thus called ru-ru.