CC Madhya 9.97

mahāprabhu puchila tāṅre, śuna, mahāśaya
kon artha jāni’ tomāra eta sukha haya
Word for word: 
mahāprabhu — Śrī Caitanya Mahāprabhu; puchila — inquired; tāṅre — from him; śuna — please hear; mahā-āśaya — My dear sir; kon — what; artha — meaning; jāni’ — knowing; tomāra — your; eta — so great; sukha — happiness; haya — is.
Translation: 
Śrī Caitanya Mahāprabhu asked the brāhmaṇa, “My dear sir, why are you in such ecstatic love? Which portion of the Bhagavad-gītā gives you such transcendental pleasure?”