[Machine] The Prophet ﷺ said to al-Abbas: "Oh my uncle, should I not teach you, should I not grant you, should I not inform you, should I not do ten things for you, if you do them, Allah will forgive your first and last sins, the old and the new, the secret and the public, the small and the big, the intentional and the unintentional? You should pray four Rak'ahs and recite Al-Fatiha and a Surah in each Rak'ah. Then, after finishing the recitation in the first Rak'ah, you say fifteen times while standing: "Subhan Allah, Alhamdulillah, La ilaha illallah, Allahu Akbar," then you make a bow and say ten times while bowing, and then you lift your head and say it ten times while standing, then you prostrate and say it ten times while prostrating, then you lift your head and say it ten times while sitting, then you prostrate again and say it ten times while prostrating again. If you do this in four Rak'ahs, then if your sins were as much as the foam of the sea or as much as the sand on the beaches, Allah will forgive you."
أَنَّ النَّبِيَّ ﷺ قَالَ لِلْعَبَّاسِ يَا عَمَّاهُ أَلَا أُعَلِّمُكَ أَلَا أَمْنَحُكَ أَلَا أُخْبِرُكَ أَلَا أَفْعَلُ بِكَ عَشَرَ خِصَالٍ إِذَا أَنْتَ فَعَلْتَ ذَلِكَ غَفَرَ اللهُ لَكَ ذَنْبَكَ أَوَّلَهُ وَآخِرَهُ قَدِيمَهُ وَحَدِيثَهُ سِرَّهُ وَعَلَانِيَتَهُ صَغِيرَهُ وَكَبِيرَهُ خَطَأَهُ وَعَمْدَهُ أَنْ تُصَلِّيَ أَرْبَعَ رَكَعَاتٍ تَقْرَأُ فِي كُلِّ رَكْعَةٍ مِنْهَا بِفَاتِحَةِ الْكِتَابِ وَسُورَةٍ فَإِذَا فَرَغْتَ مِنَ الْقِرَاءَةِ أَوَّلَ رَكْعَةٍ قُلْتَ وَأَنْتَ قَائِمٌ سُبْحَانَ اللهِ وَالْحَمْدُ لِلَّهِ وَلَا إِلَهَ إِلَّا اللهُ وَاللهُ أَكْبَرُ خَمْسَ عَشْرَةَ مَرَّةً ثُمَّ تَرْكَعُ فَتَقُولُ وَأَنْتَ رَاكِعٌ عَشْرًا ثُمَّ تَرْفَعُ رَأْسَكَ فَتَقُولُ وَأَنْتَ قَائِمٌ عَشْرًا ثُمَّ تَسْجُدُ فَتَقُولُهَا عَشْرًا ثُمَّ تَرْفَعُ رَأْسَكَ فَتَقُولُ وَأَنْتَ جَالِسٌ عَشْرًا ثُمَّ تَسْجُدُ فَتَقُولُهَا عَشْرًا ثُمَّ تَرْفَعُ رَأْسَكَ فَتَقُولُهَا عَشْرًا فَذَلِكَ خَمْسَةٌ وَسَبْعُونَ تَفْعَلُ ذَلِكَ فِي أَرْبَعِ رَكَعَاتٍ فَلَوْ كَانَتْ ذُنُوبُكَ مِثْلَ زَبَدِ الْبَحْرِ أَوْ رَمَلٍ عَالِجٍ غَفَرَهَا اللهُ لَكَ