俱舍論疏 10.109

10.109

論「於壽與煖至定約剎那」，有部引例證是剎那。於中有二：一引例證、二責違經。此即初也。壽與煖俱既說相雜，故知此雜亦是剎那。

On the Śāstra's statement: "Regarding vitality and warmth ... definitely in terms of the moment": the Sarvāstivādin cites an analogy to prove it is momentary. In this there are two points: first, citing an analogy as proof; second, reproaching for contradicting the sūtra. This is the first. Since vitality and warmth co-existing are spoken of as intermingled, we know that this intermingling is also momentary.