成唯識論述記 1.604

1.604

又彼執。地等所生麁果。眼根等色根所取。父母極微非色根取。以極微細。非色根取故。

Moreover, they posit that coarse effects produced from earth and so forth are apprehended by physical sense faculties such as the eye faculty, whereas parent atoms are not apprehended by physical sense faculties, because being extremely subtle, they are not apprehended by physical sense faculties.