CC Madhya 19.79

huṅkāra kari’ yamunāra jale dilā jhāṅpa
prabhu dekhi’ sabāra mane haila bhaya-kāṅpa
Word for word: 
huṅkāra kari’ — making a loud sound; yamunāra jale — in the water of the river Yamunā; dilā — gave; jhāṅpa — a plunge; prabhu dekhi’ — seeing Lord Śrī Caitanya Mahāprabhu; sabāra — of everyone; mane — in the mind; haila — there was; bhaya-kāṅpa — fear and trembling.
Translation: 
Indeed, as soon as Śrī Caitanya Mahāprabhu saw the river Yamunā, He immediately made a great sound and jumped into the water. Everyone was filled with fear and trembling to see this.