MUṆḌAKA UPANISHAD · 2.2.5

यस्मिन् द्यौः पृथिवी चान्तरिक्षमोतं
मनः सह प्राणैश्च सर्वैः ।
तमेवैकं जानथ आत्मानमन्या वाचो
विमुञ्चथामृतस्यैष सेतुः ॥ ५॥

yasmin dyauḥ pṛthivī cāntarikṣamotaṃ
manaḥ saha prāṇaiśca sarvaiḥ ।
tamevaikaṃ jānatha ātmānamanyā vāco
vimuñcathāmṛtasyaiṣa setuḥ ॥ 5॥

He in whom are inwoven heaven and earth and the midregion, and mind with all the life-currents, Him know to be the one Self; other words put away from you: this is the bridge to immortality.