瑜伽師地論略纂 2.61

2.61

The concluding statement that "the differences in the dharmas of the six internal and six external āyatanas amount to six hundred and sixty" is based on the twelve āyatanas, each progressively enumerated up to ten, with each one having fifty-five varieties, which makes six hundred and sixty dharmas that ought to be progressively enumerated. In actual principle this is not so. In the progressive enumeration of the five faculties, none has a progression of ten, but has eleven, already exceeding by five; the mind āyatana goes up to twelve without a progression of ten, and the latter exceeds by thirteen. In this progressive enumeration, there is an excess of eighteen altogether, not to mention not calculating the eighty-seven dharmas subsumed by the dharma-dhātu, and so forth. From this one should know that it merely refers to the grand total of the twelve āyatanas each progressively enumerated up to ten.