CC Antya 10.50

prabhura ei jala-krīḍā dāsa-vṛndāvana
‘caitanya-maṅgale’ vistāri’ kariyāchena varṇana
Word for word: 
prabhura — of Śrī Caitanya Mahāprabhu; ei — these; jala-krīḍā — activities in the water; dāsa-vṛndāvana — Vṛndāvana dāsa Ṭhākura; caitanya-maṅgale — in his book Caitanya-maṅgala, now known as Caitanya-bhāgavata; vistāri’ — describing in detail; kariyāchena varṇana — has narrated.
Translation: 
In his Caitanya-maṅgala [now known as Caitanya-bhāgavata], Vṛndāvana dāsa Ṭhākura has given a detailed description of the activities the Lord performed in the water.