CC Madhya 11.97

bhaṭṭācārya kahe ei madhura vacana
caitanyera sṛṣṭi — ei prema-saṅkīrtana
Word for word: 
bhaṭṭācārya — Sārvabhauma Bhaṭṭācārya; kahe — replied; ei — this; madhura vacana — transcendental sweetness of the voice; caitanyera sṛṣṭi — the creation of Lord Śrī Caitanya Mahāprabhu; ei — this; prema-saṅkīrtana — chanting in the ecstasy of love of Godhead.
Translation: 
Sārvabhauma Bhaṭṭācārya replied, “This sweet transcendental sound is a special creation of the Lord known as prema-saṅkīrtana, congregational chanting in love of Godhead.