CC Ādi 10.97

mahāprabhura līlā yata bāhira-antara
dui bhāi tāṅra mukhe śune nirantara
Word for word: 
mahāprabhura — of Lord Śrī Caitanya Mahāprabhu; līlā — pastimes; yata — all; bāhira — external; antara — internal; dui bhāi — the two brothers; tāṅra — his; mukhe — in the mouth; śune — hear; nirantara — always.
Translation: 
Because Raghunātha dāsa Gosvāmī was an assistant to Svarūpa Dāmodara, he knew much about the external and internal features of the pastimes of Lord Caitanya. Thus the two brothers Rūpa and Sanātana always used to hear of this from him.