妙法蓮華經玄義 4.172

4.172

Furthermore, the persons of the three vehicles all manifest the real uncontaminated [wisdom], and whether in knowledge or in severance, it is equally called unproduced. Yet the bodhisattva alone receives the name "patience of the unproduced Dharma" because in seeing the principle of the truths and severing the entangling fetters, they do not produce the mind of grasping realization; hence they specifically receive the name of the patience of the unproduced Dharma. Why? If they were to produce the mind of grasping realization, they would immediately fall into the stages of the two vehicles and could not enter the ninth stage of the bodhisattva.