Charak Samhita
अग्निदोषान्मनुष्याणां रोगसङ्घाः पृथग्विधाः। मलवृद्ध्या प्रवर्तन्ते विशेषेणोदराणि तु ॥९॥
॥ Pathogenesis of udara roga॥ Abnormalities of jatharagni (digestive power) leads to the morbid accumulation of the mala (dosha and bodily wastes) and in turn tend to cause multiple diseases and particularly udara roga.
english translation
agnidoSAnmanuSyANAM rogasaGghAH pRthagvidhAH। malavRddhyA pravartante vizeSeNodarANi tu ॥9॥
hk transliteration by Sanscript