حَدَّثَنَا مُحَمَّدُ بْنُ سَعِيدِ بْنِ يَزِيدَ بْنِ إِبْرَاهِيمَ التُّسْتَرِيُّ، حَدَّثَنَا الْفَضْلُ بْنُ الْمُوَفَّقِ أَبُو الْجَهْمِ، حَدَّثَنَا فُضَيْلُ بْنُ مَرْزُوقٍ، عَنْ عَطِيَّةَ، عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ، قَالَ قَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ ‏"‏ مَنْ خَرَجَ مِنْ بَيْتِهِ إِلَى الصَّلاَةِ فَقَالَ اللَّهُمَّ إِنِّي أَسْأَلُكَ بِحَقِّ السَّائِلِينَ عَلَيْكَ وَأَسْأَلُكَ بِحَقِّ مَمْشَاىَ هَذَا فَإِنِّي لَمْ أَخْرُجْ أَشَرًا وَلاَ بَطَرًا وَلاَ رِيَاءً وَلاَ سُمْعَةً وَخَرَجْتُ اتِّقَاءَ سُخْطِكَ وَابْتِغَاءَ مَرْضَاتِكَ فَأَسْأَلُكَ أَنْ تُعِيذَنِي مِنَ النَّارِ وَأَنْ تَغْفِرَ لِي ذُنُوبِي إِنَّهُ لاَ يَغْفِرُ الذُّنُوبَ إِلاَّ أَنْتَ - أَقْبَلَ اللَّهُ عَلَيْهِ بِوَجْهِهِ وَاسْتَغْفَرَ لَهُ سَبْعُونَ أَلْفَ مَلَكٍ ‏"‏ ‏.‏

It was narrated that Abu Sa'eed Al-Khudri said: "The Messenger of Allah said: 'Whoever leaves his house for the prayer and says: 'Allahumma inni asa'luka bi-haqqis-sa'ilina 'alaika, wa as'aluka bi-haqqi mamshaya hadha, fa inni lam akhruj asharan wa la batran, wa la riya'an, wa la sum'atan, wa kharajtu-ttiqa'a sukhtika wabtigha'a mardatika, fa as'aluka an tu'idhani minan-nari wa an taghfira li dhunubi, Innahu la yaghfirudh-dhunuba illa Anta. (O Allah, I ask You by the right that those who ask of You have over You, and I ask by virtue of this walking of mine, for I am not going out because of pride or vanity, or to show off or make a reputation, rather I am going out because I fear Your wrath and seek Your pleasure. So I ask You to protect me from the Fire and to forgive me my sins, for no one can forgive sins except You),' Allah will turn His Face towards him and seventy thousand angels will pray for his forgiveness." Translation Not Available

Book Ref: Sunan Ibn Majah Book 4 Hadith 778
Web Ref:  Sunan Ibn Majah Vol 1 Book 4 Hadith 778