Mahabharata 3.81.16

ततो जयन्त्या राजेन्द्र सोमतीर्थं समाविशेत्स्नात्वा फलमवाप्नोति राजसूयस्य मानवः

tato jayantyā rājendra somatīrthaṃ samāviśetsnātvā phalamavāpnoti rājasūyasya mānavaḥ

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