Charak Samhita
बिडं कालोत्थलवणं सर्जिकायवशूकजम्। सप्तलां कण्टकारीं च चित्रकं चेति दाहयेत्॥१७१॥
॥ Ksharaghrita॥ Bida lavana, kalottha lavana, sarjikakshara, yavakshara, saptala, kanthakari and chitraka are burned together and later on mixed in water and filtered seven times.
english translation
biDaM kAlotthalavaNaM sarjikAyavazUkajam। saptalAM kaNTakArIM ca citrakaM ceti dAhayet॥171॥
hk transliteration by Sanscript