俱舍論疏 28.109

28.109

論「初二定中無樂根故」，有部總略答也。定中既無樂根，故知言樂是輕安樂。

On the treatise passage: "Because there is no faculty of pleasure in the first two absorptions": this is the Sarvāstivādin's summary answer. Since there is no faculty of pleasure in the absorptions, one knows that the mention of pleasure refers to the pleasure of pliancy.