Charak Samhita
साध्यमसाध्यं कृच्छ्रं कुष्ठं कुष्ठापहाश्च ये योगाः। सिद्धाः किलासहेतुर्लिङ्गं गुरुलाघवं तथा शान्तिः ॥१७९॥
curable and difficult to cure types of kushtha, preparation useful in kushtha. Similarly etiology, symptoms, curable and incurable symptoms and treatment of śvitrā have been explained.
english translation
sAdhyamasAdhyaM kRcchraM kuSThaM kuSThApahAzca ye yogAH। siddhAH kilAsaheturliGgaM gurulAghavaM tathA zAntiH ॥179॥
hk transliteration by Sanscript