The Compendium of Caraka 2.1.23

2.1.23

tadyadā &prakupitamāmāśayādūṣmāṇamupasṛjyādyamāhārapariṇāmadhātuṃ rasanāmānamanvavetya rasasvedavahāni srotāṃsi pidhāya dravatvādagnimupahatya paktisthānādūṣmāṇaṃ &bahirnirasya prapīḍayat kevalaṃ śarīramanuprapadyate, tadā jvaramabhinirvartayati//

When aggravated, it approaches the heat of the stomach, reaches the primary tissue resulting from the digestion of food called chyle, blocks the channels carrying chyle and sweat, impairs the digestive fire due to its liquidity, expels the heat outward from the seat of digestion, and, causing distress, spreads through the entire body; then it produces fever.