俱舍論疏 24.124

24.124

論「學要有三至為三自體」，出學體。有學之人依此三種求漏盡也。

The Śāstra says: "Training has three essentials […] as the intrinsic nature of the three." This identifies the intrinsic nature of training. Persons who are trainees rely on these three to seek the destruction of contaminants.