CHĀNDOGYA UPANISHAD · 4.17.9

एष ह वा उदक्प्रवणो यज्ञो यत्रैवंविद् ब्रह्मा भवति ।
एवंविदं ह वा एषा ब्रह्माणम् अनु गाथा ।
यतो यत आवर्तते तत् तद् गच्छति ॥

eṣa ha vā udakpravaṇo yajño yatraivaṃvid brahmā bhavati ।
evaṃvidaṃ ha vā eṣā brahmāṇam anu gāthā ।
yato yata āvartate tat tad gacchati ॥

That sacrifice is inclined towards the north (in the right way) in which there is a Brahman priest who knows this. And with regard to such a Brahman priest there is the following Gâthâ: 'Whereever it falls back, thither the man goes,'--

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