俱舍論疏 29.25

29.25

論「或有欲令至方能起故」，述異說。此師意說：未至無也，以四無量容預德故，已離欲者方能起故。未至器速多非離欲，故言無也。

The Śāstra states: "Or some would have it that... up to: only then can they be generated." This relates a divergent view. This master's intention is: they do not exist in the not-yet-arrived [dhyāna], because the four immeasurables are virtues of ease and unhurriedness, and only one who has already separated from desire can generate them. Those in the vessel of the not-yet-arrived are mostly hurried and not free from desire, hence he says they do not exist there.