Charak Samhita
नाडीव्रणाः पक्वशोथास्तथा क्षतगुदोदरम् । अन्तःशल्याश्च ये शोफाः [१] पाट्यास्ते तद्विधाश्च ये ॥५६॥
[Indications of various surgical procedures] Sinuses, ripened inflammations (i.e.suppurated ulcer or abscess), intestinal perforation, intestinal obstruction, having foreign body within and other similar conditions are incisable.
english translation
nADIvraNAH pakvazothAstathA kSatagudodaram । antaHzalyAzca ye zophAH [1] pATyAste tadvidhAzca ye ॥56॥
hk transliteration by Sanscript