Bṛhad-bhāgavatāmṛta Part 1 Chapter 1 Text 11

bhagavad-bhakti-śāstrāṇām
ayaṁ sārasya saṅgrahaḥ
anubhūtasya caitanya-
deve tat-priya-rūpataḥTRANSLATION
This book collects the essence of the scriptures teaching devotional service rendered to the Supreme Lord. These essential teachings I have personally realized under the shelter of Lord Caitanya Mahāprabhu. I received them from His dear devotee Śrī Rūpa.