俱舍論疏 8.38

8.38

論「又欲之界至應知亦然」，又一釋欲界。欲是所任持，界是能任持。界是持義，即欲界五蘊能持欲故，必名欲之界。餘二亦爾，即是四蘊、五蘊是欲等界義也。有人似不得意。

On the Śāstra's statement: "Furthermore, the realm of desire ... should be known likewise": this is another explanation of the desire realm. Desire is that which is sustained; the realm is that which sustains. "Realm" (*dhātu*) has the meaning of sustaining; that is, because the five skandhas of the desire realm can sustain desire, it is necessarily called the "realm of desire". The other two are also like this: that is, the four skandhas and the five skandhas are the meanings of the realms of desire and so on. Someone seems to have missed the point.