CC Madhya 9.241

bahu yatne sei puṅthi nila lekhāiyā
‘ananta padmanābha’ āilā haraṣita hañā
Word for word: 
bahu yatne — with great attention; sei puṅthi — that scripture; nila — took; lekhāiyā — having it copied; ananta-padmanābha — to Ananta Padmanābha; āilā — came; haraṣita — in great happiness; hañā — being.
Translation: 
Śrī Caitanya Mahāprabhu copied the Brahma-saṁhitā, and then with great pleasure He went to a place known as Ananta Padmanābha.
Purport: 

Concerning Ananta Padmanābha, one should refer to Madhya-līlā, chapter one, text 115.