CC Madhya 1.93

nityānanda prabhu mahāprabhu bhulāiyā
gaṅgā-tīre lañā āilā ‘yamunā’ baliyā

nityānanda prabhu—Lord Nityānanda Prabhu; mahāprabhu—Śrī Caitanya Mahāprabhu; bhulāiyā—bewildering; gaṅgā-tīre—on the bank of the Ganges; lañā—taking; āilā—brought; yamunā—the river Yamunā; baliyā—informing.

First of all, Lord Nityānanda bewildered Śrī Caitanya Mahāprabhu by bringing Him along the banks of the Ganges, saying that it was the river Yamunā.