Self-realized Jamadagni
Srimad-Bhagavatam
SB Canto 9
The perfectly self-realized Jamadagni had the responsibility for chanting the mantras from the Yajur Veda
SB 9.7.22, Translation: In that great human sacrifice, Viśvāmitra was the chief priest to offer oblations, the perfectly self-realized Jamadagni had the responsibility for chanting the mantras from the Yajur Veda, Vasiṣṭha was the chief brahminical priest, and the sage Ayāsya was the reciter of the hymns of the Sāma Veda.