SB 10.58.42
kintv asmabhih krtah purvam
samayah satvatarsabha
pumsam virya-pariksartham
kanya-vara-paripsaya
Translation:
But to ascertain the proper husband for my daughter, O chief of the Satvatas, we previously set a condition to test the prowess of her suitors.
Purport:
According to Srila Visvanatha Cakravarti, the King’s actual purpose in setting up the test was to obtain Sri Krsna as his son-in-law, since only He could subdue the bulls. Without such a test it would have been difficult for Nagnajit to refuse the many apparently qualified princes and kings who came to ask for his daughter’s hand in marriage.