大毘盧遮那成佛經疏 10.133

10.133

次降三世明王真言。皆是毘盧遮那如來住於法幢高峯觀加持三昧，如初〈序品〉中說也。如來說此二明皆是彼法佛三昧，為令行人從初發菩提心守護增長令生成佛果圓，終不退失不墮在非道者，即不動明王是也。為降伏世間難調眾生故，即降三世明王是也。相次說之。所謂三世者，世名貪瞋癡，降此三毒名降三世。又由如過去貪故，今受此貪報之身，復生貪業受未來報。三毒皆爾，名為降三世也。復次三世者名為三界，謂毘盧遮那如來，始從有頂迄至下地，從上向下相次一一天處皆化，化無量眷屬大天之主。今勝彼天百千萬倍，彼怖未曾有，更有何眾生而勝我耶。乃至以法而降伏之，即次第而下。以能降伏三世界主故，名降三世明王也。

Next is the mantra of the vidyārāja Trailokyavijaya. All are from Vairocana Tathāgata abiding in the adhiṣṭhāna-samādhi of observing the peak of the Dharma banner, as explained in the initial "Introductory Chapter." The Tathāgata spoke these two vidyās, both of which are samādhis of that Dharma Buddha, in order to guard and increase the practitioner from their initial arousal of the bodhicitta, allowing them to bring about the perfection of the Buddha fruit, never retrogressing and never falling into wrong paths—this is Acala Vidyārāja. To subjugate difficult-to-tame sentient beings of the world—this is Trailokyavijaya Vidyārāja. They are spoken in succession. As for the so-called "three worlds," "world" refers to greed, anger, and delusion; subjugating these three poisons is called "subjugating the three worlds." Furthermore, because of greed in the past, one now receives this body of retribution for greed, and again produces karma of greed to receive future retribution. It is likewise for all three poisons; this is called "subjugating the three worlds." Furthermore, the "three worlds" refers to the triple realm, meaning that Vairocana Tathāgata, starting from the Peak of Existence down to the lowest planes, transformed successively from top to bottom in every heavenly abode, manifesting as masters of great devas with immeasurable retinues. Now, surpassing those devas by hundreds of thousands of millions of times, they felt unprecedented fear, wondering what sentient being could surpass them. Even up to subjugating them with the Dharma, he descended in succession. Because he is able to subjugate the lords of the three realms, he is called the vidyārāja Trailokyavijaya.