Srimad Bhagavatam 10.74.16-17 - According to State of Consciousness we get Affected (download mp3) and (download mp4)
by Radhanath Swami at ISKCON Chowpatty
The priests, as powerful as gods, performed the Rajasuya sacrifice for King Yudhisthira in accordance with the Vedic injunctions, just as the demigods had previously performed it for Varuna.
sutye ’hany avani-palo
On the day of extracting the soma juice, King Yudhisthira properly and very attentively worshiped the priests and the most exalted personalities of the assembly.
Srila Prabhupada writes in Krsna: “According to the Vedic system, whenever there is an arrangement for sacrifice, the members participating in the sacrifice are offered the juice of the soma plant, which is a kind of life-giving beverage. On the day of extracting the soma juice, King Yudhisthira very respectfully received the special priest who had been engaged to detect any mistake in the formalities of sacrificial procedures. The idea is that the Vedic mantras must be enunciated perfectly and chanted with the proper accent; if the priests who are engaged in this business commit any mistake, the checker, or referee priest, immediately corrects the procedure, and thus the ritualistic performances are perfectly executed. Unless it is perfectly executed, a sacrifice cannot yield the desired result. In this Age of Kali there is no such learned brahmana or priest available; therefore, all such sacrifices are forbidden. The only sacrifice recommended in the sastras is the chanting of the Hare Krsna mantra.”