the Messenger of Allah (saas) said: "Seek refuge with Allah from poverty, insufficiency and humiliation, and from wronging (others) and being wronged.'" (Using translation from Ibn Mājah 3842)  

عَنْ رَسُولِ اللهِ ﷺ قَالَ «تَعَوَّذُوا بِاللهِ مِنَ الْفَقْرِ وَالْقِلَّةِ وَالذِّلَّةِ وَأَنْ تَظْلِمَ أَوْ تُظْلَمَ»  

He heard his father say following the prayer: "Allahumma inni a'udhu bika minal-kufri wal-faqri, wa 'adhabil-qabri (O Allah, I seek refuge with You from Kufr, poverty and the torment of the grave.)" I started to recite them and he said: "O my son, where did you learn these words?" I said: "O my father, I heard you saying this supplication at the end of the prayer, and I learned them from you." He said: "Continue to recite them, O my son, for the Prophet of Allah [SAW] used to say this supplication at the end of the prayer." (Using translation from Nasāʾī 5465)  

سَمِعَ وَالِدَهُ يَقُولُ فِي دُبُرِ الصَّلَاةِ «اللهُمَّ إِنِّي أَعُوذُ بِكَ مِنَ الْكُفْرِ وَالْفَقْرِ وَعَذَابِ الْقَبْرِ» فَجَعَلْتُ أَدْعُو بِهِنَّ فَقَالَ يَا بُنَيَّ أَنَّى عَلِمْتَ هَؤُلَاءِ الْكَلِمَاتِ؟ قَالَ يَا أَبَهْ سَمِعْتُكَ تَدْعُو بِهِنَّ فِي دُبُرِ الصَّلَاةِ فَأَخَذْتُهُنَّ عَنْكَ قَالَ فَالْزَمْهُنَّ يَا بُنَيَّ فَإِنَّ نَبِيَّ اللهِ ﷺ كَانَ يَدْعُو بِهِنَّ فِي دُبُرِ الصَّلَاةِ