The works of Ādi Śaṅkarācārya

Chāndogyopaniṣadbhāṣyam

Verse 392

तद्य एवैतावरं च ण्यं चार्णवौ ब्रह्मलोके ब्रह्मचर्येणानुविन्दन्ति तेषामेवैष ब्रह्मलोकस्तेषां सर्वेषु लोकेषु कामचारो भवति ॥ ४ ॥

In plain words

Those who realize these two oceans, Ara and Nya, in the world of Brahman through the practice of sacred restraint—the world of Brahman belongs to them alone, and in every world their movement is completely free.

Close to the Sanskrit

That which these two oceans, Ara and Nya, in the world of Brahman, those who attain them through disciplined celibacy—for them alone is this world of Brahman, for them there is freedom of movement in all worlds.