For supporting the life you eat the four kinds of food. Assuming also the form of Agni within the Stomach, you digest that food. Salutations to you in you form of digesting fire.
प्राणानां धारणार्थाय योऽनं भुक्के चतुर्विधम्। अन्तर्भूतः पचत्यग्निस्तस्मै पाकात्मने नमः॥