CC Ādi 4.58

ithi lāgi’ āge kari tāra vivaraṇa
yāhā haite haya gaurera mahimā-kathana
Word for word: 
ithi lāgi’ — for this; āge — first; kari — I shall do; tāra — of that; vivaraṇa — description; yāhā haite — from which; haya — there is; gaurera — of Lord Caitanya Mahāprabhu; mahimā — the glory; kathana — relating.
Translation: 
Therefore I shall first delineate the position of Rādhā and Kṛṣṇa. From that description the glory of Lord Caitanya will be known.