CC Madhya 25.149
vedyaṁ vāstavam atra vastu śiva-daṁ tāpa-trayonmūlanam
śrīmad-bhāgavate mahā-muni-kṛte kiṁ vā parair īśvaraḥ
sadyo hṛdy avarudhyate ’tra kṛtibhiḥ śuśrūṣubhis tat-kṣaṇāt
dharmaḥ — religiosity; projjhita — completely rejected; kaitavaḥ — in which there is fruitive intention; atra — herein; paramaḥ — the highest; nirmatsarāṇām — of the one hundred percent pure in heart; satām — devotees; vedyam — to be understood; vāstavam — factual; atra — herein; vastu — substance; śiva-dam — giving well-being; tāpa-traya — of the threefold miseries; unmūlanam — causing uprooting; śrīmat — beautiful; bhāgavate — in the Bhāgavata Purāṇa; mahā-muni — by the great sage (Vyāsadeva); kṛte — compiled; kim — what; vā — indeed; paraiḥ — with others; īśvaraḥ — the Supreme Lord; sadyaḥ — at once; hṛdi — within the heart; avarudhyate — becomes confined; atra — herein; kṛtibhiḥ — by pious men; śuśrūṣubhiḥ — desiring to hear; tat-kṣaṇāt — without delay.
“ ‘Completely rejecting all religious activities which are materially motivated, this Bhāgavata Purāṇa propounds the highest truth, which is understandable by those devotees who are fully pure in heart. The highest truth is reality distinguished from illusion for the welfare of all. Such truth uproots the threefold miseries. This beautiful Bhāgavatam, compiled by the great sage Vyāsadeva [in his maturity], is sufficient in itself for God realization. What is the need of any other scripture? As soon as one attentively and submissively hears the message of Bhāgavatam, by this culture of knowledge the Supreme Lord is established within his heart.’
This is a quotation from Śrīmad-Bhāgavatam (1.1.2). See also Ādi-līlā, chapter one, text 91.