gaṅgā-yamunā - the river Ganges and river Yamunā; prayāga - Prayāga; nārila - were not able; ḍubāite - to flood; prabhu - Śrī Caitanya Mahāprabhu; ḍubāila - flooded; kṛṣṇa-premera - of ecstatic love of Kṛṣṇa; vanyāte - in an inundation.

Prayāga is located at the confluence of two rivers — the Ganges and the Yamunā. Although these rivers were not able to flood Prayāga with water, Śrī Caitanya Mahāprabhu inundated the whole area with waves of ecstatic love for Kṛṣṇa.