Vaishnava Samhita. Shri Surdas Charitam. Vol III Book VII Chp 5 Shlokas 12 - 15

एकदाsशोकवृक्षस्य छायायां यमुनातटे |

सूरदासो महाभागः कीर्तयन्नास सुस्वरम् ||

तदा राधिकया साकं भगवन्नन्दनन्दनः |

मधुरं वादयन् वेणुमाजगाम तदन्तिकम् ||

तयोर्दिव्यसुगन्धेन मोहितो भक्तसत्तमः |

न शशाक च तौ द्रष्टुं जात्यन्धः शङ्कितोपि च ||

तत्समीपं प्रगच्छन्तीं प्रेयसीं वर्षभानुजाम् |

उवाच मधुरं कृष्णः परिहाससमन्वितः ||

Once, seated under the cool shade of an Ashoka tree on the bank of the Yamuna, Surdas, the mahatma was singing melodiously. At that time, Shri Nandakumara, accompanied by Devi Radha, came there playing on His flute captivatingly. Enchanted by the sacred fragrance emanating from Their bodies, Surdas was in a state of doubt and confusion. But he could not see them as he was blind. Looking at His spouse, Radha, who was approaching very near to Shri Surdas, Shri Krishna humourously remarked as follows.