Mahabharata 1.48.7

1.48.7

sadasyaścābhavadvyāsaḥ putraśiṣyasahāyavān |
uddālakaḥ śamaṭhakaḥ śvetaketuśca pañcamaḥ || 7 ||

"Sauti replied, 'I will recite the names of those wise ones who became the monarch's Ritwiks and Sadasyas. The Brahmana Chandabhargava became the Hotri in that sacrifice. He was of great reputation, and was born in the race of Chyavana and was the foremost of those acquainted with the Vedas. The learned old Brahmana, Kautsa, became the Udgatri, the chanter of the Vedic hymns. Jaimini became the Brahmana, and Sarngarva and Pingala the Adhvaryus, Vyasa with his son and disciples, and Uddalaka, Pramataka, Swetaketu, Pingala, Asita, Devala, Narada, Parvata, Atreya, Kundajathara, the Brahmana Kalaghata, Vatsya, old Srutasravas ever engaged in japa and the study of the Vedas. Kohala Devasarman, Maudgalya, Samasaurava, and many other Brahmanas who had got through the Vedas became the Sadasyas at that sacrifice of the son of Parikshit.