唯識二十論述記 2.103

2.103

述曰：若許同處，則汝所言諸聚色法同一微量，應不成麁。不成麁故，過如前說。前說者何？謂若六同處聚，量應如微，則應聚色亦不可見。比量如前，故不重述。

Commentary: If you admit they occupy the same location, then according to what you say, all phenomena of aggregated form would have the measure of a single paramāṇu and could not become coarse. Because they could not become coarse, the fault is as stated before. What was stated before? It means that if six [paramāṇus] occupy the same location, the measure of the aggregate should be like a single paramāṇu, and then aggregated form should also be invisible. The formal inference is as before, hence it is not repeated.