大毘盧遮那成佛經疏 10.130

10.130

真言首歸命普遍諸佛者，以一切之名猶自普遍。如指東方一切佛，即不遍十方。為簡此少分一切，故云普遍諸佛。他效此。一切佛菩薩母虛空眼竟。時佛又復一切為障者息故，火生名三昧證，說此大摧障真言。此有威勢能除一切修真言者種種障難，乃至佛在道樹，以此真言故一切魔軍無不散壞，何況世間諸障也。又此障略有二障：一者內障，謂從自心而生，其類甚多不可詳說。二者外障，謂從外事而生，亦甚多。皆能摧滅也。

The mantra begins with homage to the pervasive buddhas, because the name "all" is still all-pervading. For example, pointing to "all buddhas of the east" does not pervade the ten directions. To exclude such partial "all," it says "pervasive buddhas." Other [passages] follow this. The section on Gaganarocanā, mother of all buddhas and bodhisattvas, is finished. Then, for the pacification of all obstructors, the Buddha realized the samādhi named "Fire-born" and spoke this mantra that greatly crushes obstructions. It possesses great majesty and can eliminate all kinds of obstacles and difficulties for mantra practitioners, even up to when the Buddha was at the Bodhi tree: through this mantra, there was no army of Māra that was not dispersed and destroyed, to say nothing of worldly obstructions! Furthermore, these obstructions, in brief, are twofold: first, internal obstructions, which arise from one's own mind, of which there are so many types they cannot be detailed; second, external obstructions, which arise from external affairs, which are also very numerous. It can crush and destroy them all.