Śrīmad-Bhāgavatam · Text 11.8.44
Who is speaking and story frame
आशा हि परमं दु:खं नैराश्यं परमं सुखम् ।
यथा सञ्छिद्य कान्ताशां सुखं सुष्वाप पिङ्गला ॥ ४४ ॥
āśā hi paramaṁ duḥkhaṁ
nairāśyaṁ paramaṁ sukham
yathā sañchidya kāntāśāṁ
sukhaṁ suṣvāpa piṅgalā
Material desire is undoubtedly the cause of the greatest unhappiness, and freedom from such desire is the cause of the greatest happiness. Therefore, completely cutting off her desire to enjoy so-called lovers, Piṅgalā very happily went to sleep.
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.