俱舍論頌疏論本 3.100

3.100

Explanation: "At most, one possesses nineteen" indicates [the maximum number]. "One with two sexes excludes the three pure ones" explains it. This clarifies that an ordinary worldling possesses nineteen faculties: a person with two sexes is necessarily not a noble one, and therefore lacks the three pure ones. The "three pure ones" are the three undefiled faculties. Aside from these three, it is possible for them to possess all the remaining nineteen faculties.