saba rātri - all night; mahāprabhu - Śrī Caitanya Mahāprabhu; kare - does; jāgaraṇa - remaining without sleep; ucca kari' - very loudly; kahe kṛṣṇa-nāma-saṅkīrtana - chants the holy name of Kṛṣṇa.

Śrī Caitanya Mahāprabhu remained awake throughout the entire night, chanting the Hare Kṛṣṇa mantra very loudly.