華嚴經探玄記 19.6

19.6

第二饒益行中，初舉法勸修內，初國名輸那者，此名淨，亦名善，是大江名也。謂國有此江，從事為名。諸外道世人皆云：於此江中洗浴，悉滅罪增福，故以為名。表持戒行，捨離業非。童子名釋天主者，童子以表戒行清潔；於戒自在，故名天主。又准天竺本，應名諸根自在，以梵名因陀羅，此云帝釋名也。因達唎，此云根也。濕筏羅，此云自在，亦名主也。以釋天及根梵言相近，故各據一名也。二勸往教問。

In the second, Beneficent Practice, first, in presenting the Dharma and exhorting practice: first, the country named Śūna: this means pure, and also good; it is the name of a great river. That is, the country has this river and takes its name from this circumstance. All non-Buddhists and worldly people say: “Bathing in this river completely extinguishes sins and increases merit,” hence it is taken as the name. It signifies the practice of keeping the precepts, abandoning and departing from karmic wrongdoing. The boy named Śakradevendrā: “boy” signifies the purity of precept practice; being sovereign in the precepts, he is named “Lord of the Devās.” Furthermore, according to the Indic text, he should be named “Sovereign of the Faculties,” because the Sanskrit name Indra is here translated as Śakra's name; indriya is here translated as “faculty”; īśvara is here translated as “sovereign,” and also as “lord.” Because the Sanskrit words for Śakra and faculty are close, each is based on one name. Second, exhorting him to go and instructing him to ask.