俱舍論疏 2.101

2.101

論「餘謂餘四至有等流性」，此釋色、香、味、觸四界也。色有情數者，有異熟生及所長養，三性業俱唯有等流性。香、味、觸三有情數者，有異熟、長養，無記業俱者是等流性。一切外五境皆是等流。

Regarding the text of the treatise: "The rest means the other four... have outflowing nature": this explains the four elements of visible form, odor, taste, and tactile objects. Form belonging to sentient beings has ripening-born and nourished [varieties], while that conjoined with karma of the three moral natures has only outflowing nature. Odor, taste, and tactile objects belonging to sentient beings have ripening and nourished [varieties], while those conjoined with neutral karma are of outflowing nature. All external five sense objects are exclusively outflowing.