成唯識論述記 2.322

2.322

述曰：「遍」簡色及五識，不遍三界故。「恒續」簡第六識，「異熟」簡第七，此阿賴耶識足為界、趣、生體，是遍三界一切位中，及不斷、恒相續。復是引業，真異熟果。餘法雖亦屬界、趣、生，非真異熟，故汝無勞，別執有實命根。「界」雖亦通餘法，此是真實界體故也。

The Commentary states: 'Pervasive' excludes form and the five consciousnesses, because they do not pervade the three realms. 'Constantly continuous' excludes the sixth consciousness. 'Maturation' excludes the seventh. This ālayavijñāna is sufficient to serve as the substance of the realms, destinies, and types of birth: it is pervasive throughout all states in the three realms, and is unbroken and constantly continuous. Furthermore, it is the true maturation fruit of projecting karma. Although other dharmas also pertain to realms, destinies, and births, they are not true maturation; therefore, you labor in vain to grasp separately at a real life faculty. Although 'realm' also applies broadly to other dharmas, this is the true substance of the realms.