俱舍論記 22.99

22.99

「由身變易至甘酢味起」者，說一切有部答。由身變易前後分位差別不同，前位樂生，後時苦起。如酒等後時分位差別不同，初甘味起，後酢味生，非由先有後方生也。

Regarding "Owing to bodily alteration ... sweet and sour tastes arise": The Sarvāstivādins reply: Owing to the bodily alteration, the preceding and succeeding states are distinct and different; in the preceding state pleasure arises, and in the subsequent state suffering arises. It is like the distinct differences of subsequent states in wine and the like: initially a sweet taste arises, and subsequently a sour taste arises; it is not that [the latter] already existed previously and only then arose.