俱舍論記 13.55

13.55

「又諸所有至假立長等」者，經部復難。又諸所有五根、五境有對實色，必應有實別類極微。以理窮研，然無極微名為長等，故即眾多顯極微物如是安布差別相中假立長等。立量云：形非實有，無別微故，如空華等。

On "Furthermore, all existing ... nominally designate length and the like": The Sautrāntika raises another objection: Furthermore, all existing real forms with resistance among the five sense faculties and five sense fields must have distinct kinds of real atoms. Investigating thoroughly through reason, however, there are no atoms called 'long' and the like; therefore, it is precisely within the differentiated configuration of many atoms of visible color that 'long' and the like are nominally designated. Formulating an inference: Shape is not real, because it lacks distinct atoms, like a flower in the sky.