仁王般若經疏 2.84

2.84

是以波若下，大段第四明波若忘言離著。就中有二：初依空起行、第二歎說。就起行中有四句：初明不可得眾生中行而行，以生空無所有故；二不可得五陰中行而行，以法空無所有故；三不可得境中行而行，以境空無所有故；四不可得解中行以而行，以知空無所有故。第二歎說中有三：第一是故波若不可思議，歎十四波若；二出生三世諸佛不可思議；三知俗虛幻而能化益。

From "therefore prajñā" onward is the fourth major section, explaining that prajñā forgets words and is free from attachment. Within this there are two [parts]: first, giving rise to practice based on emptiness; second, praising the teaching. Within giving rise to practice, there are four clauses: first, explaining that it cannot be apprehended as practicing within sentient beings and yet practicing, because the emptiness of sentient beings is nonexistent; second, that it cannot be apprehended as practicing within the pañca-skandha and yet practicing, because the emptiness of phenomena is nonexistent; third, that it cannot be apprehended as practicing within the objective sphere and yet practicing, because the emptiness of the objective sphere is nonexistent; fourth, that it cannot be apprehended as practicing within understanding and yet practicing, because the emptiness of knowing is nonexistent. In the second part, praising the teaching, there are three [aspects]: first, "therefore prajñā is inconceivable," praising the fourteen prajñās; second, that giving birth to all buddhas of the three times is inconceivable; third, knowing that the conventional is illusory and yet being able to transform and benefit.