Charak Samhita
यस्य नाशात्तु नाशोऽस्ति धारि यद्धृदयाश्रितम् । यच्छरीररसस्नेहः प्राणा यत्र प्रतिष्ठिताः ॥११॥
It enters the heart during cardiogenesis, and its deficiency or loss leads to degeneration of the body. It is the seat of the essence of unctuous body fluids and vital life forces.
english translation
yasya nAzAttu nAzo'sti dhAri yaddhRdayAzritam । yaccharIrarasasnehaH prANA yatra pratiSThitAH ॥11॥
hk transliteration by Sanscript