Charak Samhita
नातिस्निग्धशरीराय दद्यात् स्नेहविरेचनम्। स्नेहोत्क्लिष्टशरीराय रूक्षं दद्याद्विरेचनम्॥८३॥
The employment of snigdha virechana(unctuous purgatives) is contraindicated in atisnigdha persons. To manage the morbidity caused by excess snehana, ruksha virechana (non-unctuous purgatives) is advised.
english translation
nAtisnigdhazarIrAya dadyAt snehavirecanam। snehotkliSTazarIrAya rUkSaM dadyAdvirecanam॥83॥
hk transliteration by Sanscript