CC Antya 17.3

ei-mata mahāprabhu rātri-divase
unmādera ceṣṭā, pralāpa kare premāveśe
Word for word: 
ei-mata — in this way; mahāprabhu — Śrī Caitanya Mahāprabhu; rātri-divase — night and day; unmādera — of a madman; ceṣṭā — activities; pralāpa kare — talks insanely; prema-āveśe — in ecstatic love.
Translation: 
Absorbed in ecstasy, Śrī Caitanya Mahāprabhu acted and talked like a madman day and night.