Charak Samhita
विरुद्धैरपिनत्वेतेगुणैर्घ्नन्तिपरस्परम्। दोषाःसहजसात्म्यत्वाद्विषंघोरमहीनिव॥२९३॥
॥ Harmony among the dosha॥ The dosha viz, vayu, pitta and kapha never destroy each other inspite of having contradictory properties, they coexist in a harmonious state. This happens because of their sahaja- satmya (natural wholesome disposition of coexistence), as even fatal poison does not effect snakes
english translation
viruddhairapinatveteguNairghnantiparasparam। doSAHsahajasAtmyatvAdviSaMghoramahIniva॥293॥
hk transliteration by Sanscript