In the beginning of Mahābhārata (Mahaharata), when Ugraśravā (Urrasrava) Sauti had been describing the Sarpasatra or Sarpayajña (Sarpayajna; a ritual fire- sacrifice involving the destruction of snakes) of Janamejaya, Śaunaka (Saunaka) asked him — who were the Ṛtvik (Ritwik) of this great and tragic yajña, and who were the sadasya (members) of it? Ugraśravā said, Chaṇḍabhārgava , a Brāhmaṇa belonging to the vaṁśa (vamsa; genealogical or disciple-wise line of sages) of Maharṣi (Maharshi; Great Sage) Cyavana (Chyavana) was appointed the Hotā (Hota) of this yajña. Kautsya Jaimini was Udgātā (Udgata), Maharṣi Piṅgala was Adhvaryu, and Śārṅgarava (Sarngarava) was Brahmā (Brahma). Vyāsa, along with his son and disciples were  among the sadasya of this yajña. Uddālaka (Uddalaka), Pramataka, Śvetaketu (Swetaketu), Piṅgala (Pingala), Asita-Devala, Nārada (Narada)and several other sages were also among the members of this yajña —

ete cānye ca vahavaḥ…

sadasyāścābhavaṁstatra satre pārikṣitasya ha.