俱舍論疏 14.13

14.13

論「由形改轉至非異三體」，答同所以。既轉根位，唯得捨名，不得捨體，故知是一。

On the Śāstra's statement: "Due to the alteration of physical gender... to ...they are not distinct from the three essences": This answers the reason for their identity. Since at the stage of the transformation of the sex-faculty one merely loses the designation but does not lose the essence, we know that they are one.