Srimad Bhagavatam Canto 11, Chapter 19, Text 19

SB 11.19.19

bhakti-yogah puraivoktah
 priyamanaya te ’nagha
punas ca kathayisyami
 mad-bhakteh karanam param
O sinless Uddhava, because you love Me, I previously explained to you the process of devotional service. Now I will again explain the supreme process for achieving loving service unto Me.
Although Lord Krsna previously described bhakti-yoga to Sri Uddhava, Uddhava is not yet satisfied, because he loves Lord Krsna. Anyone who loves the Lord cannot be fully satiated by discussions of devotional service mixed with descriptions of mere Vedic duties and analytic philosophy. The supreme stage of conscious existence is pure love of Krsna, and one who is addicted to Lord Krsna desires to constantly drink the nectar of such topics. Lord Krsna has given an extensive survey of many aspects of human civilization, including the varnasrama-dharma system and the processes of distinguishing between matter and spirit, renouncing sense gratification, and so forth. Now Uddhava is hankering to hear specifically about pure devotional service to Lord Krsna, and the Lord thus turns to that topic.
Srimad Bhagavatam Canto 11, Chapter 19, Text 18
Srimad Bhagavatam Canto 11, Chapter 19, Text 20-24