金剛經纂要刊定記 7.44

7.44

論云下。釋也。一真法界數量消滅，非一異故，諸佛證此亦非一異。而言處住者，以非此二義可住著故。

From "The treatise says..." onward is the explanation. In the one true dharmadhātu, quantities are extinguished; because it is neither one nor different, the Buddhas' realization of this is also neither one nor different. As for speaking of "abiding in a place," it is because neither of these two meanings can be clung to as an abiding place.