Charak Samhita
चण्डः साहसिको भीरुः कृतघ्नो व्यग्र एव च। सद्राजभिषजां द्वेष्टा तद्द्विष्टः शोकपीडितः॥४॥
॥ Persons who are generally anupakramya (unsuitable for treatment)॥ The wise physician should not treat the following types of patients: 1. Who is fierceful or aggressive, adventurous, fearful, ungrateful and fickle minded; 2. Who hates good persons, kings and physicians and who is intensely disliked by them; 3. Who is afflicted with grief;
english translation
caNDaH sAhasiko bhIruH kRtaghno vyagra eva ca। sadrAjabhiSajAM dveSTA taddviSTaH zokapIDitaH॥4॥
hk transliteration by Sanscript