Hārīta's Compendium of Medicine 1.1.15.8

1.1.15.8

kalamānyā laghuḥ pathyā vātaśleṣmavivarddhinī
bilvajā māgadhī pītā sāmānyāstāguṇāguṇaiḥ

the third consists of six thousand, and the fourth of only three [thousand];