CC Antya 19.34

pūrve yena viśākhāre rādhikā puchilā
sei śloka paḍi’ pralāpa karite lāgilā
Word for word: 
pūrve — formerly; yena — as; viśākhāre — unto Viśākhā; rādhikā — Śrīmatī Rādhārāṇī; puchilā — inquired; sei śloka — that verse; paḍi’ — reciting; pralāpa — talking like a crazy man; karite lāgilā — began to do.
Translation: 
Just as Śrīmatī Rādhārāṇī inquired from Her personal friend Viśākhā, Śrī Caitanya Mahāprabhu, reciting that very verse, began speaking like a madman.