CC Madhya 2.3

śeṣa ye rahila prabhura dvādaśa vatsara
kṛṣṇera viyoga-sphūrti haya nirantara
Word for word: 
śeṣa — at the end; ye — those; rahila — remained; prabhura — of Lord Śrī Caitanya Mahāprabhu; dvādaśa vatsara — twelve years; kṛṣṇera — of Lord Kṛṣṇa; viyoga — of separation; sphūrti — manifestation; haya — is; nirantara — always.
Translation: 
During His last twelve years, Śrī Caitanya Mahāprabhu always manifested all the symptoms of ecstasy in separation from Kṛṣṇa.