तं चेदेतस्मिन्वयसि किंचिदुपतपेत्स ब्रूयात्प्राणा अदित्या इदं मे तृतीयसवनमायुरनुसंतनुतेति माहं प्राणानामादित्यानां मध्ये यज्ञो विलोप्सीयेत्युद्धैव तत एत्यगदो हैव भवति ॥ ३.१६.६ ॥
In plain words
If any sickness should afflict him at that age, let him say, "Ye breaths, ye Ādityas, join this third pressing of mine to a full span of life; let me, who am the sacrifice, not be cut off in the midst of the breaths, the Ādityas." And he rises up from it and becomes free of sickness.