大毘盧遮那成佛經疏 17.43

17.43

次佛言：祕密主！如是修學句，若菩薩隨所有修學，即與諸佛菩薩同行，當如是學。聲聞以近彼佛戒等名近同，今與佛同等也。修學句，菩薩隨所修學，諸佛世尊及菩薩同事，應當學者，此身三口四意地之三，即是一切菩薩修學句，是一切菩薩學處也。此即是一切菩薩隨順眾生戒，隨順即是同事也。又一切佛菩薩皆如是行，以一切菩薩法爾當行故，今我亦如是行，即是與一切佛菩薩同事業也（更問）。此本性戒自然合行，故《涅槃》云性自能持戒也。

Next, the Buddha said: "Lord of Mysteries! Such clauses of study, if a bodhisattva trains in them according to what exists, then they will practice together with all buddhas and bodhisattvas; they should train in this way." The śrāvaka is called 'closely conforming' because of proximity to that Buddha's precepts and the like; here, one is equal with the Buddha. As for the clauses of study in which the bodhisattva trains, acting in common with all the buddhas, bhagavats, and bodhisattvas, and in which one ought to train: these three of the body, four of speech, and three of the mental ground are precisely the clauses of study of all bodhisattvas and the bases of training for all bodhisattvas. This is precisely the precept of adapting to sentient beings of all bodhisattvas, and adapting is precisely acting in common with them. Furthermore, all buddhas and bodhisattvas practice in this way; because all bodhisattvas naturally ought to practice thus, now I also practice thus, which is having common deeds with all buddhas and bodhisattvas (inquire further). This intrinsic precept naturally accords with practice; thus the Nirvāṇa [Sūtra] says that by nature one is able to uphold the precepts.