Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 42

Sanskrit:

किन्‍त्‍वस्माभि: कृत: पूर्वं समय: सात्वतर्षभ ।पुंसां वीर्यपरीक्षार्थं कन्यावरपरीप्सया ॥ ४२ ॥

ITRANS:

kintv asmābhiḥ kṛtaḥ pūrvaṁsamayaḥ sātvatarṣabhapuṁsāṁ vīrya-parīkṣārthaṁkanyā-vara-parīpsayā

Translation:

But to ascertain the proper husband for my daughter, O chief of the Sātvatas, we previously set a condition to test the prowess of her suitors.

Purport:

According to Śrīla Viśvanātha Cakravartī, the King’s actual purpose in setting up the test was to obtain Śrī Kṛṣṇa 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.