Rasadhyaya 356

356

aprāptau kāntalohasya cūrṇaṃ tīkṣṇasya saṃkṣipet
catuḥṣaṣṭitamaṃ cāṃśaṃ jīrṇo jīrṇe kṣipen muhuḥ //

In the absence of lodestone iron, one should add powder of sharp steel; / and a sixty-fourth part, each time it is digested, one should throw in again.