CC Madhya 3.37

paścima-dhāre yamunā vahe, tāhāṅ kaile snāna
ārdra kaupīna chāḍi’ śuṣka kara paridhāna
Word for word: 
paścima-dhāre — in the western flow; yamunā — the river Yamunā; vahe — flows; tāhāṅ — there; kaile — You did; snāna — bathing; ārdra — wet; kaupīna — underwear; chāḍi’ — giving up; śuṣka — dry; kara — do; paridhāna — putting on.
Translation: 
Advaita Ācārya then suggested that since Caitanya Mahāprabhu had taken His bath in the river Yamunā and His underwear was now wet, the Lord should change His underwear for dry garments.