Narrated Sa'd bin Abi Waqqas (RA):

Allah's Messenger (ﷺ) used to seek Allah's protection by invoking this supplication (Du'a) at the end of every Salat (prayer): "O Allah, I seek refuge in You from stinginess, I seek refuge in You from cowardice, I seek refuge in You from old age (and senility), I seek refuge in You from the temptation of the world and I seek refuge in You from the punishment in the grave." [Reported by al-Bukhari].

وَعَنْ سَعْدِ بْنِ أَبِي وَقَّاصٍ ‏- رضى الله عنه ‏- قَالَ : { إِنَّ رَسُولَ اَللَّهِ ‏- صلى الله عليه وسلم ‏-كَانَ يَتَعَوَّذُ بِهِنَّ دُبُرَ اَلصَّلَاةِ : " اَللَّهُمَّ إِنِّي أَعُوذُ بِكَ مِنْ اَلْبُخْلِ وَأَعُوذُ بِكَ مِنْ اَلْجُبْنِ , وَأَعُوذُ بِكَ مِنْ أَنْ أُرَدَّ إِلَى أَرْذَلِ اَلْعُمُرِ , وَأَعُوذُ بِكَ مِنْ فِتْنَةِ اَلدُّنْيَا , وَأَعُوذُ بِكَ مِنْ عَذَابِ اَلْقَبْرِ } رَوَاهُ اَلْبُخَارِيُّ .‏ [1]‏