gaṅgā-yamunā prayāga nārila ḍubāite
prabhu ḍubāila kṛṣṇa-premera vanyāte
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.
Link to this page: https://prabhupadabooks.com/cc/madhya/19/40