俱舍論頌疏論本 2.79

2.79

釋曰：鼻等者，等取舌、身。此三唯能取等量境。言等量者，如根微量，境微亦然，相稱合生鼻等識故。眼耳取境大小不定，謂眼有時見小如見毛端，有時見大如見山等，有時取等如見蒲桃。耳不定者，取蚊虻雲琴聲，大小等別。雲聲是雷，依雲起故，西方呼雷為雲聲也。意無質礙，不可辨其形量差別。

The commentary says: 'Beginning with the nose' includes the tongue and body. These three can only grasp objects of equal magnitude. 'Equal magnitude' means that just as is the atomic size of the faculty, so is the atomic size of the object; because they correspond and unite, they produce the olfactory and subsequent consciousnesses. The eye and ear grasp objects of unfixed magnitude: the eye sometimes sees something small, such as the tip of a hair, sometimes sees something large, such as a mountain, and sometimes grasps something of equal size, such as seeing a grape. The ear's being unfixed means it grasps differences in magnitude, such as the sounds of mosquitoes, gnats, clouds, and lutes. 'Cloud sound' is thunder, which arises dependent on clouds; in the western regions thunder is called 'cloud sound'. The mind has no material obstruction, so differences in its shape or magnitude cannot be distinguished.