Vaishnava Samhita. Shri Vyasadasa Charitam I. Vol II Book VI Chp 2 Shloka 8

सौरतं दिव्यदम्पत्योर्द्रष्टुं नार्हति कोपि च

गोपीभावयुतैर्भक्तैः श्रूयते नूपुरध्वनिः   ||

No one is eligible to witness the communion of the couple, Radha and Krishna. Only the sweet tinkling of the anklets of the pair is heard by a few devotees nurturing prema bhakti.

Vaishnava Samhita. Shri Vyasadasa Charitam I. Vol II Book VI Chp 2 Shlokas 6 - 7

Shri Vyasadasa Charitam I. Vol II Book VI C 1 Shlokas 6 - 7

सेवाकुञ्जसमीपे स वसन्नित्यं दृढव्रतः 

राधिकाकृष्णयोः सेवां चकार प्रेमपूर्वकम्  ||

इदमेव परं सौख्यं भावुकानां महात्मनाम् 

राधामाधवयोर्दास्यं निकुञ्जे लभ्यते यदि  ||

The steadfast Vyasadeva resided near the Seva Nikunja of the divine couple and was ever engaged in the sacred service of Shri Krishna and Radha. The great ones filled with loving devotion find amazing happiness when they get the chance of serving Shri Radha and Krishna in the Nikunja.