金剛經纂要刊定記 5.43

5.43

以唯下。二、雙釋。清淨身即法身也。此釋有物之句，即是經中是名大身也。

"Because solely, etc.": second, paired explanation. The pure body is the dharmakāya. This explains the phrase "there being an entity," which corresponds in the sūtra to "this is called a great body."