Vaishnava Samhita. Shri Nandadasa Charitam. Vol III Book VII Chp 10 Shlokas 5 - 6

आनन्दबाष्पसुस्निग्धो रोमाञ्चपरिभूषितः |

कण्ठावरोधसम्युक्तश्चक्रे श्रीनाथकीर्तनम् ||

रण्यन् मधुरं वीणां चिन्तयन् कृष्णकेलिकाम् |

कीर्तयन् हरिनामानि चचार च महावने ||

He used to sing in praise of Shrinatha in a voice choked with the emotion of prema bhakti, a body highly excited and damp with tears of divine joy. He used to wander all over Shri Brindavan chanting the Divine Names of Shri Hari and playing on the Veena very melodious compositions dealing with the divine pastimes of Shri Krishna.