CC Antya 1.138

bhaktānām udagād anargala-dhiyāṁ vargo nisargojjvalaḥ
śīlaiḥ pallavitaḥ sa ballava-vadhū-bandhoḥ prabandho ’py asau
lebhe catvaratāṁ ca tāṇḍava-vidher vṛndāṭavī-garbha-bhūr
manye mad-vidha-puṇya-maṇḍala-parīpāko ’yam unmīlati
Synonyms: 
bhaktānām — of devotees; udagāt — has appeared; anargala-dhiyām — constantly thinking of Rādhā-Kṛṣṇa; vargaḥ — the assembly; nisarga-ujjvalaḥ — naturally very advanced; śīlaiḥ — with natural poetic decorations; pallavitaḥ — spread like the leaves of a tree; saḥ — that; ballava-vadhū-bandhoḥ — of the friend of the gopīs, Śrī Kṛṣṇa; prabandhaḥ — a literary composition; api — even; asau — that; lebhe — has achieved; catvaratām — the quality of a quadrangular place with level ground; ca — and; tāṇḍava-vidheḥ — for dancing; vṛndā-aṭavī — of the forest of Vṛndāvana; garbha-bhūḥ — the inner grounds; manye — I consider; mat-vidha — of persons like me; puṇya-maṇḍala — of groups of pious activities; parīpākaḥ — the full development; ayam — this; unmīlati — appears.
Translation: 
“ ‘The devotees now present are constantly thinking of the Supreme Lord and are therefore highly advanced. This work named Vidagdha-mādhava depicts the characteristic pastimes of Lord Kṛṣṇa with decorations of poetic ornaments. And the inner grounds of the forest of Vṛndāvana provide a suitable platform for the dancing of Kṛṣṇa with the gopīs. Therefore I think that the pious activities of persons like us, who have tried to advance in devotional service, have now attained maturity.’
Purport: 

This is verse 8 of the first act of the Vidagdha-mādhava.