Charak Samhita
अपां क्षयाद्धि तृष्णा संशोष्य नरं प्रणाशयेदाशु । तस्मादैन्द्रं तोयं समधु पिबेत्तद्गुणं वाऽन्यत् ॥२५॥
॥ Properties of pure rain water and its benefits॥ Due to the loss of watery elements, man becomes dehydrated and dies soon due to thirst; the patients should therefore drink pure rain water mixed with honey, or any other water having similar properties that of rain water.
english translation
apAM kSayAddhi tRSNA saMzoSya naraM praNAzayedAzu । tasmAdaindraM toyaM samadhu pibettadguNaM vA'nyat ॥25॥
hk transliteration by Sanscript