حَدَّثَنَا أَحْمَدُ بْنُ عُبَيْدِ اللَّهِ الْغُدَانِيُّ، أَخْبَرَنَا غَسَّانُ بْنُ عَوْفٍ، أَخْبَرَنَا الْجُرَيْرِيُّ، عَنْ أَبِي نَضْرَةَ، عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ، قَالَ دَخَلَ رَسُولُ اللَّهِ صلى الله عليه وسلم ذَاتَ يَوْمٍ الْمَسْجِدَ فَإِذَا هُوَ بِرَجُلٍ مِنَ الأَنْصَارِ يُقَالُ لَهُ أَبُو أُمَامَةَ فَقَالَ ‏"‏ يَا أَبَا أُمَامَةَ مَا لِي أَرَاكَ جَالِسًا فِي الْمَسْجِدِ فِي غَيْرِ وَقْتِ الصَّلاَةِ ‏"‏ ‏.‏ قَالَ هُمُومٌ لَزِمَتْنِي وَدُيُونٌ يَا رَسُولَ اللَّهِ ‏.‏ قَالَ ‏"‏ أَفَلاَ أُعَلِّمُكَ كَلاَمًا إِذَا أَنْتَ قُلْتَهُ أَذْهَبَ اللَّهُ عَزَّ وَجَلَّ هَمَّكَ وَقَضَى عَنْكَ دَيْنَكَ ‏"‏ ‏.‏ قَالَ قُلْتُ بَلَى يَا رَسُولَ اللَّهِ ‏.‏ قَالَ ‏"‏ قُلْ إِذَا أَصْبَحْتَ وَإِذَا أَمْسَيْتَ اللَّهُمَّ إِنِّي أَعُوذُ بِكَ مِنَ الْهَمِّ وَالْحَزَنِ وَأَعُوذُ بِكَ مِنَ الْعَجْزِ وَالْكَسَلِ وَأَعُوذُ بِكَ مِنَ الْجُبْنِ وَالْبُخْلِ وَأَعُوذُ بِكَ مِنْ غَلَبَةِ الدَّيْنِ وَقَهْرِ الرِّجَالِ ‏"‏ ‏.‏ قَالَ فَفَعَلْتُ ذَلِكَ فَأَذْهَبَ اللَّهُ عَزَّ وَجَلَّ هَمِّي وَقَضَى عَنِّي دَيْنِي ‏.‏

Narrated AbuSa'id al-Khudri: One day the Messenger of Allah (PBUH) entered the mosque. He saw there a man from the Ansar called AbuUmamah. He said: What is the matter that I am seeing you sitting in the mosque when there is no time of prayer? He said: I am entangled in cares and debts, Messenger of Allah. He replied: Shall I not teach you words by which, when you say them, Allah will remove your care, and settle your debt? He said: Why not, Messenger of Allah? He said: Say in the morning and evening: "O Allah, I seek refuge in Thee from care and grief, I seek refuge in Thee from incapacity and slackness, I seek refuge in Thee from cowardice and niggardliness, and I seek in Thee from being overcome by debt and being put in subjection by men." He said: When I did that Allah removed my care and settled my debt. Translation Not Available

Book Ref: Sunan Abi Dawud Book 8 Hadith 1555
Web Ref:  Sunan Abi Dawud Book 8 Hadith 1550