CHĀNDOGYA UPANISHAD · 1.7.8

अथानेनैव ये चैतस्माद् अर्वाञ्चो लोकास् तांश् चाप्नोति मनुष्यकामांश् च ।
तस्माद् उ हैवंविद् उद्गाता ब्रूयात् ॥

athānenaiva ye caitasmād arvāñco lokās tāṃś cāpnoti manuṣyakāmāṃś ca ।
tasmād u haivaṃvid udgātā brūyāt ॥

And he obtains through the other the worlds beneath that, and the wishes of men. Therefore an Udgâtri priest who knows this, may say (to the sacrificer for whom he officiates);