Āyurvedarasāyana

saṅkhyayā kalpanāṃ vibhajati-ṣaṭ pañcakā iti| pañcakāḥ-pañcarasasaṃyogabhedāḥ ṣaṭ, pṛthagrasabhedāḥ ṣaṭ, catuṣkāḥ pañcadaśa, dvikāśca pañcadaśa, trikā viṃśatiḥ, ṣadāsvādaṃ dravyameko bhedaḥ, ityevaṃ triṣaṣṭiḥ kalpanābhedāḥ|