大毘盧遮那成佛經疏 5.13

5.13

經云「若族姓子住是戒者，當以身語意合而為一」者，此戒梵云三嚩羅，是共緣共成此戒之義，所謂慧方便等之所集成。若尸羅者，但是清淨義也。又三嚩羅是平等義，佛言以身口意合為一者，即是住三平等法門，所以得名三世無障礙戒也。如佛為諸聲聞略說教誡，則云此三業道淨是大仙人道，從十二年後，稍演其義成種種律儀。今此持明略戒義亦如是，若行人三業方便悉皆正順三平等處，當知即具一切諸佛律儀也。復次裂諸想網，是三嚩羅義，謂戲論諸見之網，經緯相成重複交絡，故名為網。今行者觀身口業自無別體，統末歸本唯是一心，而此心實相常是平等法界，是故住此戒時種種身口意業皆同一相，無量見網皆悉淨除，是故得名住無戲論金剛印也。

The sūtra says: "If a son of good family abides in this precept, he should unite body, speech, and mind as one." This 'precept' is called saṃvara in Sanskrit, which has the sense of mutually conditioning and mutually completing this precept—that is, it is brought together and constituted by wisdom, upāya, and the like. 'Śīla', on the other hand, solely has the meaning of purity. Furthermore, saṃvara has the meaning of equality. When the Buddha says to unite body, speech, and mind as one, this is abiding in the gateway of the three equalities, and therefore it receives the name of 'precept without obstruction across the three times'. Just as when the Buddha briefly expounded the instructions for the śrāvakas, he said that the purity of these three paths of action is the path of the Great Ṛṣi, and after twelve years gradually expanded its meaning into the various rules of discipline. The meaning of this brief precept of the vidyādhara here is also like this: if the practitioner's upāyas of the three actions all properly accord with the state of the three equalities, one should know that he is fully endowed with the disciplinary rules of all the Buddhas. Furthermore, rending the net of all conceptualizations is the meaning of saṃvara. The net of views of prapañca, with warp and woof mutually woven, overlaps and interlaces, and is therefore called a net. Now the practitioner contemplates that the actions of body and speech inherently have no separate substance: gathering the branches back to the root, they are only the one mind; and the dharmatā of this mind is eternally the equal dharmadhātu. Therefore, when abiding in this precept, the various actions of body, speech, and mind are all of a single characteristic, and the immeasurable nets of views are completely purified and eradicated. Hence it receives the name 'abiding in the vajra-mudrā free of prapañca'.