The line of transmission of Ayurveda

The teaching revealed by the divine voice was grasped directly by the gaṇadharas and then by sages holding the four pure kinds of knowledge; it came down from Ṛṣabha through all the Tīrthaṅkaras to Mahāvīra and is called vast, faultless, self-born and eternal, heard directly from śrutakevalins such as Govardhana and Bhadrabāhu. A footnote sums up the line and says Ugrādityācārya presents this work on the basis of, or as the essence of, those traditional texts.