CHĀNDOGYA UPANISHAD · 3.16.2

तं चेद् एतस्मिन् वयसि किंचिद् उपतपेत् स ब्रूयात् ।
प्राणा वसव इदं मे प्रातःसवनं माध्यंदिनं सवनम् अनुसंतनुतेति माहं प्राणानां वसूनां मध्ये यज्ञो विलोप्सीयेति ।
उद् धैव तत एत्य् अगदो ह भवति ॥

taṃ ced etasmin vayasi kiṃcid upatapet sa brūyāt ।
prāṇā vasava idaṃ me prātaḥsavanaṃ mādhyaṃdinaṃ savanam anusaṃtanuteti māhaṃ prāṇānāṃ vasūnāṃ madhye yajño vilopsīyeti ।
ud dhaiva tata ety agado ha bhavati ॥

If anything ails him in that (early) age, let him say: 'Ye Prânas, ye Vasus, extend this my morning-libation unto the midday-libation, that I, the sacrificer, may not perish in the midst of the Prânas or Vasus.' Thus he recovers from his illness, and becomes whole.

F. Max Müller · The Upanishads, Sacred Books of the East 1 (1879)