Śrīmad-Bhāgavatam · Text 11.21.23
Who is speaking and story frame
फलश्रुतिरियं नृणां न श्रेयो रोचनं परम् ।
श्रेयोविवक्षया प्रोक्तं यथा भैषज्यरोचनम् ॥ २३ ॥
phala-śrutir iyaṁ nṝṇāṁ
na śreyo rocanaṁ param
śreyo-vivakṣayā proktaṁ
yathā bhaiṣajya-rocanam
Those statements of scripture promising fruitive rewards do not prescribe the ultimate good for men but are merely enticements for executing beneficial religious duties, like promises of candy spoken to induce a child to take beneficial medicine.
Read the purport on Vedabase.ioFrom Canto 10, chapter 14 onward, the translation and purports were completed by Śrīla Prabhupāda's disciples after his departure, and published by the Bhaktivedanta Book Trust.