The Compendium of Caraka 2.1.20

2.1.20

sa yadā prakupitaḥ &praviśyāmāśayamūṣmaṇā saha miśrībhūyādyamāhārapariṇāmadhātuṃ rasanāmānamanvavetya rasasvedavāhāni srotāṃsi pidhāyāgnimupahatya paktisthānādūṣmāṇaṃ bahirnirasya kevalaṃ śarīramanuprapadyate, tadā jvaramabhinirvartayati//

When aggravated, it enters the stomach, mixes with the bodily heat, reaches the primary tissue resulting from the digestion of food called chyle (rasa), blocks the channels carrying chyle and sweat, impairs the digestive fire, expels the heat outward from the seat of digestion, and spreads through the entire body; then it produces fever.