Bṛhad-bhāgavatāmṛta Part 1 Chapter 7 Text 151

svayaṁ yad-bhakti-māhātmyam
anubhūtam itas tataḥ
sānandaṁ vīṇayā gāyan
sa yayau bhakti-lampaṭaḥTRANSLATION
Thus Nārada started on his journey to Prayāga, intoxicated with eagerness for pure devotion. Wherever he passed he vibrated his vīṇā and blissfully sang the glories of the kṛṣṇa-bhakti he had seen with his own eyes.