Mbh 9.34.1a

"Sanjaya said, 'When that fierce battle, O monarch, was about to commence, and when all the high-souled Pandavas had taken their seats, indeed, having heard that battle between those two heroes, both of whom were his disciples, was about to begin, Rama, whose banner bore the device of the palmyra palm, and who owns the plough for his weapon, came to that spot. Beholding him, the Pandavas, with Keshava, filled with joy advanced towards him, and receiving him, worshipped him with due rites. Their worship over, they then, O king, said unto him these words, "Witness, O Rama, the skill, in battle, of thy two disciples!" Rama then casting his eyes on Krishna and the Pandavas, and looking at Duryodhana also of Kuru's race who was standing there armed with mace, said, "Two and forty days have passed since I left home. I had set out under the constellation Pushya and have come back under Sravana. I am desirous, O Madhava, of beholding this encounter with the mace between these two disciples of mine!" At that time the two heroes, Duryodhana and Vrikodara, looked resplendent as they stood on the field, both armed with maces. King Yudhishthira, embracing him owning the plough for his weapon, duly enquired about his welfare and bade him welcome. Those two great bowmen, the two illustrious Krishnas, filled with joy, cheerfully saluted the hero having the plough for his weapon and embraced him. Similarly, the two sons of Madri and the five sons of Draupadi saluted Rohini's son of great strength and stood (at a respectful distance). Bhimasena of great strength and thy son, O monarch, both with uplifted maces (in their arms), worshipped Valadeva. The other kings honoured him by bidding him welcome, and then all of them said unto Rama, "Witness this encounter, O thou of mighty arms!" Even thus those mighty car-warriors said unto the high-souled son of Rohini.