俱舍論疏 21.172

21.172

論「言得一者至起色纏退」，明得一也。「謂得未得」者，即是次第者斷見道惑，得六遍知也。及進斷修惑，於位位中漸得一故。及從無學起色纏退，得五下分結盡遍知。

On the Śāstra's text, "Speaking of obtaining one... retrogressing by giving rise to the entanglements of form": This explains obtaining one. "Speaking of obtaining what was not yet obtained" refers to one in gradual progression abandoning the afflictions of the path of seeing and obtaining the six parijñās, and progressing to abandon the afflictions of cultivation, gradually obtaining one in each respective stage; as well as retrogressing from the stage of non-learning by giving rise to the entanglements of form, thereby obtaining the parijñā of the exhaustion of the five lower fetters.