成唯識論演祕 2.406

2.406

即內有情五根等色業所感者，名為異熟，若外諸色及內身中，非業所感而有二分是等流色。

That is, the internal rūpa of the five sense faculties and so forth of sentient beings, which is karmically retributional, is called fruition; external forms, as well as those within the internal body that are not karmically retributional, have two divisions and are rūpa of concordant flow.