Mahabharata 9.42.39

यत्रायजद्राजसूयेन सोमः; साक्षात्पुरा विधिवत्पार्थिवेन्द्रअत्रिर्धीमान्विप्रमुख्यो बभूव; होता यस्मिन्क्रतुमुख्ये महात्मा

yatrāyajadrājasūyena somaḥ; sākṣātpurā vidhivatpārthivendraatrirdhīmānvipramukhyo babhūva; hotā yasminkratumukhye mahātmā

Our plain-language meaning of this verse is waiting for scholar review.