CC Madhya 1.244

kāśīte prabhuke āsi’ mililā sanātana
dui māsa rahi’ tāṅre karāilā śikṣaṇa
Word for word: 
kāśīte — at Vārāṇasī; prabhuke — the Lord; āsi’ — arriving; mililā — met; sanātana — Sanātana Gosvāmī; dui — two; māsa — months; rahi’ — remaining; tāṅre — unto him; karāilā — did; śikṣaṇa — instruction.
Translation: 
When Lord Caitanya Mahāprabhu arrived at Vārāṇasī, Sanātana Gosvāmī met Him there. The Lord remained there for two months and instructed Sanātana Gosvāmī perfectly.