ChU 1.1.2
एषां भूतानां पृथिवी रसः । पृथिव्या आपो रसः । अपाम् ओषधयो रसः । ओषधीनां पुरुषो रसः । पुरुषस्य वाग् रसः । वाच ऋग् रसः । ऋचः साम रसः । साम्न उद्गीथो रसः
eṣāṃ bhūtānāṃ pṛthivī rasaḥ | pṛthivyā āpo rasaḥ | apām oṣadhayo rasaḥ | oṣadhīnāṃ puruṣo rasaḥ | puruṣasya vāg rasaḥ | vāca ṛg rasaḥ | ṛcaḥ sāma rasaḥ | sāmna udgītho rasaḥ
Devanagari rendered by HREEM from the edition's roman (IAST) text; the IAST is the edition's own.
The essence of all beings is the earth, the essence of the earth is water, the essence of water the plants, the essence of plants man, the essence of man speech, the essence of speech the Rig-veda, the essence of the Rig-veda the Sâma-veda, the essence of the Sâma-veda the udgîtha (which is Om).
Translated by F. Max Müller