Astanga Hrudaya
आयूरारोग्यवीर्यौजोभूतधात्वग्निपुष्टये। स्थिता पक्वाशयद्वारि भुक्तमार्गार्गलेव सा॥५१॥
and acting as a bolt to the door of pathway of food, it is responsible for duration of life (life span), health, valour, ojas (essence of all the tissues), strength of (all) the bhutagni (fire related to the elements) and dhatvgni (fire located in the tissues) when it (grahani duodenum) is strong,
english translation
AyUrArogyavIryaujobhUtadhAtvagnipuSTaye। sthitA pakvAzayadvAri bhuktamArgArgaleva sA॥51॥
hk transliteration by Sanscript