Charak Samhita
यदाहारगुणैः पानंविपरीतंतदिष्यते। अन्नानुपानंधातूनांदृष्टंयन्नविरोधिच ॥३१९॥
[Anupana (beverages after food) General guidelines for beverages after food] That drink which is opposite in quality to that of the food taken is the proper corrigent (agent that neutralizes the undesirable-effects of a particular medication or diet). Whatever drink is not deleterious to dosha and dhatu is to be considered the right post-prandial drink.
english translation
yadAhAraguNaiH pAnaMviparItaMtadiSyate। annAnupAnaMdhAtUnAMdRSTaMyannavirodhica ॥319॥
hk transliteration by Sanscript