Aṣṭāṅgahṛdayasaṃhitā

sarvaśastrānuśastrāṇāṃ kṣāraḥ śreṣṭho bahūni yat||1||
chhedyabhedyādikarmāṇi kurute viṣameṣvapi||1||
duḥkhāvacāryaśastreṣu tena siddhimayātsu ca||2||
atikṛcchhreṣu rogeṣu yacca pāne+api yujyate||2||