[15].Surah Al-Hjir [The Rocky Tract]: Ayat 3

Ayat 3. Leave them to eat and enjoy, and let them be preoccupied with (false) hope. They will come to know! Ayat 4. And never did We destroy a township but there was a known decree for it. 

Hazrat Abu Hurairah (May Allah be pleased with him) reported: Messenger of Allah  [SAWW](PBUH) said, "Remember more often the destroyer of pleasures - death.''

[At-Tirmidhi Hadith # 2307]. 

Lesson : as mentioned above in Surah Al-Hjir Ayat 04. "let them be preoccupied with (false) hope" Being heedful and talking about death checks man from being lost in the worldly pleasures and seductions. We are, therefore, supposed to remember death frequently and to avoid remaining indifferent to post-death affairs and occurrences