CC Antya 4.229
bhāgavata-siddhāntera tāhāṅ pāiye pāra
bhāgavata-sandarbha — the Bhāgavata-sandarbha, which is also known as the Ṣaṭ-sandarbha; nāma — named; kaila — made; grantha-sāra — the essence of all scriptures; bhāgavata-siddhāntera — of conclusive information about the Supreme Personality of Godhead and His service; tāhāṅ — there; pāiye — we get; pāra — the limit.
In particular, Śrīla Jīva Gosvāmī compiled the book named Bhāgavata-sandarbha, or Ṣaṭ-sandarbha, which is the essence of all scriptures. From this book one can obtain a conclusive understanding of devotional service and the Supreme Personality of Godhead.