CC Ādi 11.36

rāḍhe yāṅra janma kṛṣṇadāsa dvijavara
śrī-nityānandera teṅho parama kiṅkara
Word for word: 
rāḍhe — in West Bengal; yāṅra — whose; janma — birth; kṛṣṇadāsa — Kṛṣṇadāsa; dvija-vara — the best brāhmaṇa; śrī-nityānandera — of Nityānanda Prabhu; teṅho — he; parama — first-class; kiṅkara — servant.
Translation: 
The twenty-first devotee of Śrī Nityānanda in Bengal was Kṛṣṇadāsa Brāhmaṇa, who was a first-class servant of the Lord.
Purport: 

In this verse the word rāḍhe refers to Rāḍhadeśa, the part of Bengal where the Ganges does not flow.