Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 43
Sanskrit:
अष्टादशमसङ्ग्राम आगामिनि तदन्तरा ।नारदप्रेषितो वीरो यवन: प्रत्यदृश्यत ॥ ४३ ॥
ITRANS:
aṣṭādaśama saṅgrāmaāgāmini tad-antarānārada-preṣito vīroyavanaḥ pratyadṛśyata
Translation:
Just as the eighteenth battle was about to take place, a barbarian warrior named Kālayavana, sent by Nārada, appeared on the battlefield.