Charak Samhita
ज्वराः कषायैर्वमनैर्लङ्घनैर्लघुभोजनैः। रूक्षस्य ये न शाम्यन्ति सर्पिस्तेषां भिषग्जितम् ॥२१६॥
[Advantage of ghee] If in a person of ununctuous disposition, jwara doesn’t get cured by the use of decoctions, emesis, fasting and by light diet, then jwara in such a person should be cured by the use of medicated ghrita (ghee).
english translation
jvarAH kaSAyairvamanairlaGghanairlaghubhojanaiH। rUkSasya ye na zAmyanti sarpisteSAM bhiSagjitam ॥216॥
hk transliteration by Sanscript