Charak Samhita
पीतं पीतं हि जलं शोषयतस्तावतो न याति शमम् । घोरव्याधिकृशानां प्रभवत्युपसर्गभूता सा ॥७॥
Though the patient perpetually drinks water yet his thirst is not quenched. Such morbid thirst arises as a complication in the persons suffering from emaciation due to grave diseases.
english translation
pItaM pItaM hi jalaM zoSayatastAvato na yAti zamam । ghoravyAdhikRzAnAM prabhavatyupasargabhUtA sA ॥7॥
hk transliteration by Sanscript