Long ago, this anthology of all the Purāṇas was spoken by wise Viṣṇu to Bṛahmā. Brahmā, with undiminished bhakti, taught it to Nārada. Nārada spoke it to Kṛṣṇa Dvaipāyana Vedavyāsa. One should study, teach, hear, and have others hear Bhāgavatam following a pure, unbroken line of guru-parampara. That is the intention of this verse. Wise Nārāyaṇa taught this to Brahmā. The missing word Brahmā should be supplied. Brahmā, without decrease in bhakti because of having no offenses (avyayaḥ), taught it to Nārada.