Vaishnava Samhita. Karmadevi Charitam. Vol II Book VI Chp 10 Shloka 30

ब्रह्मक्रुण्डसमीपे सा वृक्षमूले महावने  I
निवसन्ती प्रतिदिनं चक्रे माधवकीर्तनम्  II 

There she stayed under a tree near the Brahma Kunda and remained engaged in Krishna kirtan always.