CHĀNDOGYA UPANISHAD · 8.4.3

तद् य एवैतं ब्रह्मलोकं ब्रह्मचर्येणानुविन्दन्ति तेषाम् एवैष ब्रह्मलोकः ।
तेषां सर्वेषु लोकेषु कामचारो भवति ॥

tad ya evaitaṃ brahmalokaṃ brahmacaryeṇānuvindanti teṣām evaiṣa brahmalokaḥ ।
teṣāṃ sarveṣu lokeṣu kāmacāro bhavati ॥

And that world of Brahman belongs to those only who find it by abstinence--for them there is freedom in all the worlds.

F. Max Müller · The Upanishads, Sacred Books of the East 1 (1879)