Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 7
Sanskrit:
आसीत्सुतुमुलं युद्धमद्भुतं रोमहर्षणम् ।कृष्णशङ्करयो राजन् प्रद्युम्नगुहयोरपि ॥ ७ ॥
ITRANS:
āsīt su-tumulaṁ yuddhamadbhutaṁ roma-harṣaṇamkṛṣṇa-śaṅkarayo rājanpradyumna-guhayor api
Translation:
A most astonishing, tumultuous and hair-raising battle then commenced, with Lord Kṛṣṇa matched against Lord Śaṅkara, and Pradyumna against Kārtikeya.