成唯識論述記 1.257

1.257

述曰：第一量云：汝所執我，於一剎那應不能令大身遍動；以極小故；如極微等。此中難意如何小我，一剎那中，能令色究竟天萬六千由旬大身動轉。

The Commentary states: The first inference is: The self posited by you should not be able to cause a large body to move all over in a single kṣaṇa; because it is extremely small; like an atom (paramāṇu) and the like. The intent of the objection here is: how could a small self, in a single kṣaṇa, cause the large body of sixteen thousand yojanas in Akaniṣṭha Heaven to move?