CC Madhya 16.60

ācārya-gosāñi prabhuke kahe ṭhāre-ṭhore
ācārya tarjā paḍe, keha bujhite nā pāre
Word for word: 
ācārya-gosāñi — Advaita Ācārya; prabhuke — unto Śrī Caitanya Mahāprabhu; kahe — speaks; ṭhāre-ṭhore — by indications; ācārya — Advaita Ācārya; tarjā paḍe — reads some poetic passages; keha — anyone; bujhite — to understand; nā pāre — was not able.
Translation: 
Then Śrīla Advaita Ācārya said something to Caitanya Mahāprabhu through gestures and read some poetic passages, which no one understood.