Abu Hurairah (RAA) narrated that the Messenger of Allah said:

“Remember, as much as you can, the one thing (fact or reality) which (always) brings an end to all worldly joys and pleasures, (meaning death)”Related by At-Tirmidhi, An-Nasa’i and Ibn Hibban.

عَنْ أَبِي هُرَيْرَةَ ‏- رضى الله عنه ‏- قَالَ: قَالَ رَسُولُ اَللَّهِ ‏- صلى الله عليه وسلم ‏-{ أَكْثِرُوا ذِكْرَ هَاذِمِ [1]‏ اَللَّذَّاتِ: اَلْمَوْتِ } رَوَاهُ اَلتِّرْمِذِيُّ, وَالنَّسَائِيُّ, وَصَحَّحَهُ ابْنُ حِبَّانَ [2]‏ .‏