俱舍論疏 8.172

8.172

論「謂於一處至依異大故」，此第一也。鏡面、像色別四大造，體是對礙，如何一處二得並生？故知無像。

On the passage in the śāstra from "That is to say, in a single place" to "because they rely on different great elements": This is the first. The mirror surface and the color-form of the reflection are produced by different sets of four great elements, and their nature is resistant (sapratigha); how could two arise together in a single place? Therefore we know there is no reflection.