adhyayana-lila prabhura dasa-vrndavana
'caitanya-mangale' kaila vistari varnana
adhyayana-lila—pastimes of studying; prabhura—of the Lord; dasa-vrndavana—Vrndavana dasa Thakura; caitanya-mangale—in his book Caitanya-mangala; kaila—has done; vistari—elaborately; varnana—explanation.
In his book Caitanya-mangala [which later became Caitanya-bhagavata], Srila Vrndavana dasa Thakura very elaborately described the Lord's pastimes of study.
Link to this page: https://prabhupadabooks.com/cc/adi/15/7