Srimad Bhagavatam Canto 07, Chapter 01, Text 14-15

Text-14-15

SB 7.1.14-15

drstva mahadbhutam raja
 rajasuye maha-kratau
vasudeve bhagavati
 sayujyam cedibhu-bhujah
 
tatrasinam sura-rsim
 raja pandu-sutah kratau
papraccha vismita-mana
 muninam srnvatam idam
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
O King, at the Rajasuya sacrifice, Maharaja Yudhisthira, the son of Maharaja Pandu, personally saw Sisupala merge into the body of the Supreme Lord, Krsna. Therefore, struck with wonder, he inquired about the reason for this from the great sage Narada, who was seated there. While he inquired, all the sages present also heard him ask his question.
Srimad Bhagavatam Canto 07, Chapter 01, Text 13
Srimad Bhagavatam Canto 07, Chapter 01, Text 16