Let's enter the chapter
अथातो दीर्घञ्जीवितीयमध्यायं व्याख्यास्यामः||१||
इति ह स्माह भगवानात्रेयः||२||
Now we shall learn the chapter dheerganjeevitheeya adhyaya, said by lord Atreya.
Origin of Ayurveda
दीर्घं जीवितमन्विच्छन्भरद्वाज उपागमत्|
इन्द्रमुग्रतपा बुद्ध्वा शरण्यममरेश्वरम्||३||
Bharadwaja who is desirous of long life (Dheerga jeevana) approached Indra – The Amareshwara (lord of immortals], Sharanya.
Lineage of Ayurveda
ब्रह्मणा हि यथाप्रोक्तमायुर्वेदं प्रजापतिः|
जग्राह निखिलेनादावश्विनौ तु पुनस्ततः||४||
अश्विभ्यां भगवाञ्छक्रः प्रतिपेदे ह केवलम्|
ऋषिप्रोक्तो भरद्वाजस्तस्माच्छक्रमुपागमत्||५||
Dakshaprajapathi learned ayurveda from Brahma, Ashwini kumara learned this science form Dakshaprajapathi, Indra learned knowledge of Ayurveda from Ashwini kumara, Indra taught this to Bharadwaja, Then Bharadwaja shared this knowledge with all the sages.