仁王經疏 3.218

3.218

釋曰：第二、別釋實智證二無為。文別有三：初法性無為、次擇滅無為、後非擇滅無為。此即初也。此有兩名：一者法性、二者虛空。

Commentary: Second, specifically explaining that real wisdom realizes two unconditioned states. The text has three parts: first, the dharma-nature unconditioned; second, the analytical-cessation unconditioned; and third, the non-analytical-cessation unconditioned. This is the first. This has two names: first, dharma-nature; second, space.