Astanga Hrudaya
बहुपित्तो मृदुः कोष्ठः क्षीरेणापि विरिच्यते। प्रभूतमारुतः क्रूरः कृच्छ्राच्छ्यामादिकैरपि॥३४॥
A person with Mrudukoshta (soft intestines), even milk will induce purgation. For a person with Krurakoshta, (hard bowels, intestines), even Trivrit (a purgative herb) might cause purgation with great difficulty.
english translation
bahupitto mRduH koSThaH kSIreNApi viricyate। prabhUtamArutaH krUraH kRcchrAcchyAmAdikairapi॥34॥
hk transliteration by Sanscript