成唯識論演祕 2.179

2.179

動謂行動，行動即是色處所攝。故《成業論》云：「有說身表行動為性，何名行動？謂轉至餘方。此攝在何處？謂色處攝。何緣知此轉至餘方？謂差別相不可知故。」

Movement means physical motion, and physical motion is subsumed precisely under the sphere of form. Thus the Karmasiddhi-prakaraṇa states: 'Some say that bodily communicative action has physical motion as its nature. What is called physical motion? Namely, moving to another location. Under which sphere is this subsumed? It is subsumed under the sphere of form. From what reason is it known to move to another location? Because distinct characteristics cannot be cognized.'