param saukhyam hi nairasyam
svairiny apy aha pingala
taj janatinam nah krsne
tathapy asa duratyaya
Indeed, the greatest happiness is to renounce all desires, as even the prostitute Pingala has declared. Yet even though we know this, we cannot give up our hopes of attaining Krsna.
The story of Pingala is narrated in the Eleventh Canto, Eighth Chapter, of Srimad-Bhagavatam.