BṚHADĀRAṆYAKA UPANISHAD · 1.5.6
देवा पितरो मनुष्या एत एव ।
वाग् एव देवा मनः पितरः, प्राणो मानुष्याः ॥
devā pitaro manuṣyā eta eva ।
vāg eva devā manaḥ pitaraḥ, prāṇo mānuṣyāḥ ॥
These are the Devas, Fathers, and men: the Devas are speech, the Fathers mind, men breath.
F. Max Müller · The Upanishads, Sacred Books of the East 15 (1884)