KAṬHA UPANISHAD · 2.3.2

यदिदं किं च जगत् सर्वं प्राण एजति निःसृतम् ।
महद्भयं वज्रमुद्यतं य एतद्विदुरमृतास्ते भवन्ति ॥ २॥

yadidaṃ kiṃ ca jagat sarvaṃ prāṇa ejati niḥsṛtam ।
mahadbhayaṃ vajramudyataṃ ya etadviduramṛtāste bhavanti ॥ 2॥

All this universe of motion moveth in the Prana and from the Prana also it proceeded; a mighty terror is He, yea, a thunderbolt uplifted. Who know Him are the immortals.