Charak Samhita
भूनिम्बं रोहिणीं तिक्तां पटोलं निम्बपर्पटम्। दहेन्माहिषमूत्रेण क्षार एषोऽग्निवर्धनः॥१८१॥
Bhunimba, kutaki, tikta, patola, nimba and parpataka are burned with buffalo urine and prepared as per kshara kalpana. Such kshara promotes agnibala
english translation
bhUnimbaM rohiNIM tiktAM paTolaM nimbaparpaTam। dahenmAhiSamUtreNa kSAra eSo'gnivardhanaH॥181॥
hk transliteration by Sanscript