俱舍論頌疏論本 4.103

4.103

三界不繫三者，界繫門也。三界不繫者，是所不得法。三者，能得非得也。謂三界及不繫法各有三界非得也。且如彼欲界法有三界非得者，謂欲界有情不得欲界法，非得欲界繫；色界有情不得欲界法，非得色界繫；無色界有情不得欲界法，非得無色界繫。良由非得隨所依判，故隨所依通在三界。如欲界法有三界非得，色、無色界法有三界非得，准欲界說之。若不繫法三界非得者，欲界不得不繫法，非得欲界繫；色界不得不繫法，非得色界繫；無色不得不繫法，非得無色界繫。

"Bound to the three realms or unbound, there are three" is the section on the realms of bondage. "Bound to the three realms or unbound" are the unpossessed phenomena. "Three" refers to the non-possessions. That is, phenomena belonging to the three realms and unbound phenomena each have non-possessions of the three realms. For example, that a phenomenon of the desire realm has non-possessions of the three realms means: a sentient being of the desire realm not obtaining a desire-realm phenomenon has a non-possession bound to the desire realm; a sentient being of the form realm not obtaining a desire-realm phenomenon has a non-possession bound to the form realm; a sentient being of the formless realm not obtaining a desire-realm phenomenon has a non-possession bound to the formless realm. Because non-possession is determined by its basis, it extends across the three realms according to its basis. Just as desire-realm phenomena have non-possessions of the three realms, form- and formless-realm phenomena having non-possessions of the three realms should be understood by analogy with the desire realm. If unbound phenomena have non-possessions of the three realms: in the desire realm, not obtaining an unbound phenomenon, the non-possession is bound to the desire realm; in the form realm, not obtaining an unbound phenomenon, the non-possession is bound to the form realm; in the formless realm, not obtaining an unbound phenomenon, the non-possession is bound to the formless realm.