BṚHADĀRAṆYAKA UPANISHAD · 4.4.8

तद् एते श्लोका भवन्ति --
अणुः पन्था विततः पुराणो मां स्पृष्टो ऽनुवित्तो मयैव ।
तेन धीरा अपियन्ति ब्रह्मविदः स्वर्गं लोकम् इत ऊर्ध्वं विमुक्ताः ॥

tad ete ślokā bhavanti --
aṇuḥ panthā vitataḥ purāṇo māṃ spṛṣṭo ’nuvitto mayaiva ।
tena dhīrā apiyanti brahmavidaḥ svargaṃ lokam ita ūrdhvaṃ vimuktāḥ ॥

'On this there are these verses: 'The small, old path stretching far away has been found by me. On it sages who know Brahman move on to the Svarga-loka (heaven), and thence higher on, as entirely free.

F. Max Müller · The Upanishads, Sacred Books of the East 15 (1884)