俱舍論頌疏論本 27.18

27.18

於境無礙故者，釋力義也。智於境中知無礙故，名之為力。由此十力唯依佛身，唯佛永斷諸惑習氣，於一切境隨欲能知；餘聖不然，故不名力。

'Because they are unobstructed regarding objects' explains the meaning of 'power'. Because knowledge is unobstructed in knowing regarding objects, it is designated as a 'power'. Because of this, the ten powers rely solely on the Buddha's body: only a Buddha has forever severed all afflictions and latencies and is able to know everything at will with respect to all objects; other noble ones are not like this, and therefore [their knowledge] is not called a power.