法華義疏 6.155

6.155

「蜈蚣蚰蜒」下，第三，明無色界火起。就文為二：初、明三空火起；次、辨非想被燒。雖生四禪未免無常，復求生三空，故言「諍走出穴」，此一行序在家眾生生無色界也。

From "Centipedes and millipedes" onward, third, explains the fire starting in the formless realm. In terms of the text, there are two parts: first, explaining the fire starting in the three concentrations of emptiness; second, clarifying the sphere of neither-perception-nor-non-perception being burned. Although born in the four dhyānas, they do not escape impermanence, and again seek birth in the three concentrations of emptiness; therefore it says "scrambling to run out of their holes." This line recounts lay sentient beings being born into the formless realm.