Charak Samhita
शमप्रकोपौ दोषाणां सर्वेषामग्निसंश्रितौ। तस्मादग्निं सदा रक्षेन्निदानानि च वर्जयेत् ॥१३६॥
॥ Importance of agni॥ Equilibrium or provocation of all the dosha depend upon the condition of agni (digestion and metabolism), hence one should always take its care and avoid such causes which disturb it
english translation
zamaprakopau doSANAM sarveSAmagnisaMzritau। tasmAdagniM sadA rakSennidAnAni ca varjayet ॥136॥
hk transliteration by Sanscript