CC Antya 4.54

eka-dina āsi’ prabhu duṅhāre mililā
sanātane ācambite kahite lāgilā
Word for word: 
eka-dina — one day; āsi’ — coming; prabhu — Śrī Caitanya Mahāprabhu; duṅhāre mililā — met both of them; sanātane — unto Sanātana Gosvāmī; ācambite — all of a sudden; kahite lāgilā — began to speak.
Translation: 
One day when the Lord came to meet them, He suddenly began speaking to Sanātana Gosvāmī.