CHĀNDOGYA UPANISHAD · 3.16.4

तं चेद् एतस्मिन् वयसि किंचिद् उपतपेत् स ब्रूयात् ।
प्राणा रुद्रा इदं मे माध्यंदिनं सवनं तृतीयसवनम् अनुसंतनुतेति माहं प्राणानां रुद्राणां मध्ये यज्ञो विलोप्सीयेति ।
उद् धैव तत एत्य् अगदो ह भवति ॥

taṃ ced etasmin vayasi kiṃcid upatapet sa brūyāt ।
prāṇā rudrā idaṃ me mādhyaṃdinaṃ savanaṃ tṛtīyasavanam anusaṃtanuteti māhaṃ prāṇānāṃ rudrāṇāṃ madhye yajño vilopsīyeti ।
ud dhaiva tata ety agado ha bhavati ॥

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

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