CC Antya 15.7

eka-dina karena prabhu jagannātha daraśana
jagannāthe dekhe sākṣāt vrajendra-nandana
Word for word: 
eka-dina — one day; karena — does; prabhu — Śrī Caitanya Mahāprabhu; jagannātha — Lord Jagannātha; daraśana — visiting; jagannāthe — Lord Jagannātha; dekhe — He sees; sākṣāt — personally; vrajendra-nandana — the son of Mahārāja Nanda.
Translation: 
One day, while Śrī Caitanya Mahāprabhu was looking at Lord Jagannātha in the temple, Lord Jagannātha appeared to be personally Śrī Kṛṣṇa, the son of Nanda Mahārāja.