BṚHADĀRAṆYAKA UPANISHAD · 2.2.1

यो ह वै शिशुं साधानं सप्रत्याधानं सस्थूणं सदामं वेद सप्त ह द्विषतो भ्रातृव्यान् अवरुणद्धि ।
अयं वाव शिशुर् यो ऽयं मध्यमः प्राणः ।
तस्येदम् एवाधानम् इदं प्रत्याधानं प्राणः स्थूणान्नं दाम ॥

yo ha vai śiśuṃ sādhānaṃ sapratyādhānaṃ sasthūṇaṃ sadāmaṃ veda sapta ha dviṣato bhrātṛvyān avaruṇaddhi ।
ayaṃ vāva śiśur yo ’yaṃ madhyamaḥ prāṇaḥ ।
tasyedam evādhānam idaṃ pratyādhānaṃ prāṇaḥ sthūṇānnaṃ dāma ॥

Verily he who knows the babe with his place, his chamber, his post, and his rope, he keeps off the seven relatives who hate him. Verily by the young is meant the inner life, by his place this (body), by his chamber this (head), by his post the vital breath, by his rope the food.

F. Max Müller · The Upanishads, Sacred Books of the East 15 (1884)