Ca, Nid., 2, 9.1 tatra yadūrdhvabhāgaṃ tat sādhyaṃ virecanopakramaṇīyatvād bahvauṣadhatvācca yadadhobhāgaṃ tad yāpyaṃ vamanopakramaṇīyatvād alpauṣadhatvācca yadubhayabhāgaṃ tadasādhyaṃ vamanavirecanāyogitvād anauṣadhatvācceti //