nija-granthe karṇapūra vistāra kariyā
sanātane prabhura prasāda rākhiyāche likhiyā
nija-granthe—in his own book; karṇapūra—Kavi-karṇapūra; vistāra kariyā—vividly describing; sanātane—unto Sanātana Gosvāmī; prabhura—of Lord Śrī Caitanya Mahāprabhu; prasāda—the mercy; rākhiyāche—has kept; likhiyā—writing.
The authorized poet Kavi-karṇapūra has written a book named Caitanya-candrodaya-nāṭaka. This book tells how Śrī Caitanya Mahāprabhu blessed Sanātana Gosvāmī with His specific mercy.
Link to this page: https://prabhupadabooks.com/cc/madhya/24/347