Supplications before ending the prayer
اَللّٰهُـمَّ إِنِّيْٓ أَعُوْذُ بِكَ مِنَ الْبُخْـلِ، وَأَعُوْذُ بِكَ مِنَ الْجُـبْنِ، وَأَعُوْذُ بِكَ مِنْ أَنْ أُرَدَّ إِلٰٓى أَرْذَلِ الْـعُمُرِ، وَأَعُوْذُ بِكَ مِنْ فِتْنَـةِ الدُّنْـيَا وَعَـذَابِ الْقَـبْر
O Allah, I seek refuge in You from miserliness, I seek refuge in You from cowardice, and I seek refuge in from being returned to feeble old age. I seek refuge in You from the trials of this world and from the torment of the grave.
References
[Sahih Bukhari - 6374]