Srimad Bhagavatam Canto 09, Chapter 07, Text 22

SB 9.7.22

visvamitro ’bhavat tasmin
 hota cadhvaryur atmavan
jamadagnir abhud brahma
 vasistho ’yasyah sama-gah
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
In that great human sacrifice, Visvamitra was the chief priest to offer oblations, the perfectly self-realized Jamadagni had the responsibility for chanting the mantras from the Yajur Veda, Vasistha was the chief brahminical priest, and the sage Ayasya was the reciter of the hymns of the Sama Veda.
Srimad Bhagavatam Canto 09, Chapter 07, Text 21
Srimad Bhagavatam Canto 09, Chapter 07, Text 23