PRAŚNA UPANISHAD · 4.3

प्राणाग्नय एवैतस्मिन् पुरे जाग्रति । गार्हपत्यो ह वा एषोऽपानो
व्यानोऽन्वाहार्यपचनो यद्गार्हपत्यात् प्रणीयते प्रणयनादाहवनीयः
प्राणः ॥ ४.३॥

prāṇāgnaya evaitasmin pure jāgrati । gārhapatyo ha vā eṣo’pāno
vyāno’nvāhāryapacano yadgārhapatyāt praṇīyate praṇayanādāhavanīyaḥ
prāṇaḥ ॥ 4.3॥

“But the fires of the breath keep watch in that sleeping city. The lower breath is the householder’s fire and the breath pervasor the fire of the Lares that burneth to the southward. The main breath is the orient fire of the sacrifice; and even as the eastern fire taketh its fuel from the western, so in the slumber of a man the main breath taketh from the lower.

Sri Aurobindo · CWSA 18, p. 185