Cakradatta (Cikitsasangraha) 5.143

5.143

eṣa vahnisamaḥ kṣāraḥ kīrtitaḥ kāśyapādibhiḥ .
toye kālakamuṣkakasya vipace-
dbhasmāḍhakaṃ ṣaṅguṇe
pātre lohamaye dṛḍhe vipuladhī-
rdarvyāśanairghaṭṭayan ..
dagdhvāgnau bahuśaṅkhanābhiśakalā-
npūtāvaśeṣe kṣipet
yadyeraṇḍajanālameṣa dahati
kṣāro varo vākśatāt .. 143 ..

This caustic alkali is declared by Kāśyapa and others to be equal to fire. / A wise person should boil one āḍhaka of ashes of kālamuṣkaka / in six times as much water in a sturdy iron vessel, stirring it slowly with a ladle. / Having burnt fragments of many conch shells in fire, he should throw them into the strained residue. / If this caustic alkali burns the stalk of an eraṇḍa within a hundred spoken words, it is superior. 143