CC Madhya 6.121

vedānta-śravaṇa, — ei sannyāsīra dharma
nirantara kara tumi vedānta śravaṇa
Synonyms: 
vedānta-śravaṇa — hearing of Vedānta philosophy; ei — this; sannyāsīra — of a person in the renounced order; dharma — factual occupation; nirantara — incessantly; kara — do; tumi — You; vedānta — of Vedānta philosophy; śravaṇa — hearing.
Translation: 
The Bhaṭṭācārya said, “Hearing Vedānta philosophy is a sannyāsī’s main business. Therefore without hesitation You should study Vedānta philosophy, hearing it without cessation from a superior person.”