俱舍論記 1.235

1.235

「有說界聲至名十八界」者，第二師約差別釋。族謂族類，如世種類剎帝利等種類不同。如是一身有十八法，種類各別，名十八界。或可此師別為一解種類釋界，不同頌文。《正理》難云「若爾，意界望於六識無別體類，應非別界。此難不然，所依、能依體類別故，有說安立時分異故。」廣如彼釋。

"Some say that the word dhātu ... is called the eighteen dhātus": the second master explains it in terms of distinctions. Lineage (gotra) means category of kind, just as in the world the classes of kṣatriyas and so on are distinct kinds. In this way, there are eighteen dharmas in a single body, each distinct in category, which are called the eighteen dhātus. Or it may be that this master offers a separate explanation of dhātu as category, differing from the verse. The Nyāyānusāra objects: "If so, the mind dhātu (mano-dhātu), having no distinct entity or category compared to the six consciousnesses, should not be a separate dhātu." This objection is invalid, because the based and the basing differ in entity and category, or, as some say, because their established temporal divisions are distinct. This is elaborated as in that text.