俱舍論疏 18.36

18.36

論「若一加行至勢力強故」，明兩境同處，起一加行殺於二類，表唯從強，無表具二。

The Śāstra states: "If with a single preliminary effort... because of superior force", explaining that when two objects occupy the same place, and one undertakes a single preliminary effort to kill both kinds, the unmanifest action possesses both, while the manifest action follows only the stronger.