Charak Samhita
स्निग्धात् पात्राद्यथा तोयमयत्नेन प्रणुद्यते। कफादयः प्रणुद्यन्ते स्निग्धाद्देहात्तथौषधैः॥११॥
Like how water gets out of a vessel smeared with oil, similar is the removal of doshas from a properly oleated body.
english translation
snigdhAt pAtrAdyathA toyamayatnena praNudyate। kaphAdayaH praNudyante snigdhAddehAttathauSadhaiH॥11॥
hk transliteration by Sanscript