俱舍論頌疏論本 25.32

25.32

釋曰：無學有九，謂七聲聞，退法等五，不動分二：一名不退，先利根故；二名不動，後修得故。言二佛者，謂獨覺、大覺也。此聖差別由下下等九品根異，故成九聖也。

Explanation: There are nine aśaikṣas, namely seven śrāvakas: the five types including the fall-liable, and the immovable divided into two: the first is called non-falling, due to sharp faculties from before; the second is called immovable, due to being attained through later cultivation. The words 'two Buddhas' refer to the pratyekabuddha and the Great Awakened One. The distinctions among these noble ones are due to the differences of nine grades of faculties, from the lowest of the low upward; thus they constitute nine noble ones.