Vaishnava Samhita. Narayana Muni Charitam. Vol III Book VI Chp 21 Shlokas 15 - 16

यमुनापुलिने नित्यं चिन्तयन् व्रजनन्दनम् |
गायन्नानाविधां लीला प्रेमिकोत्तमः ||
कदाचिद्यमुनातीरे  कुर्बन्तं तर्पनञ्च तम् |
पप्रच्छ परिहासेन कश्चिद्रसिकवल्लभः ||

That devotee used to spend his days uninterrupted engaged in Krishna dhyana on the bank of the Yamuna. He went about the bank singing in praise of the varied divine pastimes of the Lord. Once when he was doing tarpan (the rite performed in honour of the great ancestors) on the bank of the Yamuna a resika laughed and asked as follows: