Śrī Caitanya Caritamrta · Text Ādi 17.298
অদ্বৈত–আচার্য–গোসাঞি ভক্ত–অবতার ।
কৃষ্ণ অবতারিয়া কৈলা ভক্তির প্রচার ॥ ২৯৮ ॥
advaita-ācārya-gosāñi bhakta-avatāra
kṛṣṇa avatāriyā kailā bhaktira pracāra
Śrīla Advaita Ācārya Prabhu appeared as an incarnation of a devotee. He is in the category of Kṛṣṇa, but He descended to this earth to propagate devotional service.
Read this verse on Vedabase.ioThis verse has no purport; its meaning is explained by the verses around it.