仁王經疏 2.503

2.503

釋曰：第二、時眾得益。若依《本記》，三空者，三假空也，地前觀。大空者，登地也。或可三空者，空、無相、無願。

Exposition: Second, the assembly at that time obtaining benefits. According to the Original Commentary, the "three emptinesses" are the emptinesses of the three designations, which is the contemplation prior to the bhūmis. The "great emptiness" is entering the bhūmis. Alternatively, the three emptinesses are emptiness, signlessness, and wishlessness.