One cannot find permanent happiness even on the heavenly planets, which one can attain in the next life by ritualistic ceremonies and sacrifices. Even in material heaven the living entity is disturbed by rivalry with his equals and envy of those superior to him. And since one’s residence in heaven is finished with the exhaustion of pious fruitive activities, the denizens of heaven are afflicted by fear, anticipating the destruction of their heavenly life. Thus they resemble kings who, though enviously admired by ordinary citizens, are constantly harassed by enemy kings and who therefore never attain actual happiness.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
एवं लोकं परं विद्यान्नश्वरं कर्मनिर्मितम् । सतुल्यातिशयध्वंसं यथा मण्डलवर्तिनाम्
evaṃ lokaṃ paraṃ vidyānnaśvaraṃ karmanirmitam | satulyātiśayadhvaṃsaṃ yathā maṇḍalavartinām
SB 11.3.20