nityānanda kahe-tumi advaita-ācārya
'advaita-siddhānte' bādhe śuddha-bhakti-kārya
nityānanda kahe—Śrīla Nityānanda Prabhu said; tumi—You; advaita-ācārya—Advaita Ācārya, or a teacher of impersonal monism; advaita-siddhānte—in that monistic conclusion; bādhe—is greatly hindered; śuddha-bhakti-kārya—the matter of pure devotional service.
Nityānanda Prabhu immediately refuted Śrīla Advaita Ācārya, saying, "You are a teacher of impersonal monism, and the monistic conclusion is a great hindrance to progressive, pure devotional service.
Link to this page: https://prabhupadabooks.com/cc/madhya/12/193