Brihadaranyaka Upanishad 4.5.11

4.5.11

sa yathārdraidhāgneramyāhitasya pṛthagdhūmā viniścarantyevaṃ vā are'syamahato bhūtasya niśvasitametadyadṛgvedo yajurvedaḥ sāmavedo'tharvāṅgirasa itihāsaḥ purāṇaṃ vidyā upaniṣadaḥ ślokāḥ sūtrāṇyanuvyākhyānāni vyākhyānānīṣṭam̐ hutamāśitaṃ pāyitamayaṃ ca lokaḥ paraśca lokaḥ sarvāṇi ca bhūtānyasyaivaitāni sarvāṇi niśvasitāni

As from a fire kindled with wet faggot diverse kinds of smoke issue, even so, my dear, the Ṛg-Veda, Yajur-Veda, Sāma-Veda, Atharvāṅgirasa, history, mythology, arts, Upanishads, verses, aphorisms, elucidations, explanations, sacrifices, oblations in the fire, food, drink, this world, the next world, and all beings are all (like) the breath of this infinite Reality. They are (like) the breath of this (Supreme Self).