Charak Samhita
बलाधिष्ठानमारोग्यं यदर्थोऽयं क्रियाक्रमः। लङ्घनं स्वेदनं कालो यवाग्वस्तिक्तको रसः ॥१४२॥
The aim of all these measures is to regain the health which also depends on the physical, mental and spiritual strength. [Management principle of jwara] Langhana (fasting), swedana (fomentation), kala (waiting period of eight days), yavagu (medicated gruels) and tikta rasa drugs (drugs having bitter taste)
english translation
balAdhiSThAnamArogyaM yadartho'yaM kriyAkramaH। laGghanaM svedanaM kAlo yavAgvastiktako rasaH ॥142॥
hk transliteration by Sanscript