Sahih Muslim 2698
Sahih Muslim · Book 48: The Book Pertaining to the Remembrance of Allah, Supplication, Repentance and Seeking Forgiveness · The Virtue Of Tahlil (Saying La Ilaha Ill-Allah), Tasbih (Saying Subhan Allah) And (Du'a) Supplication
Mus'ab b. Sa'd reported that his father told him that he had been in the company of Allah's Messenger (ﷺ) that he said:
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا مَرْوَانُ ، وَعَلِيُّ بْنُ مُسْهِرٍ ، عَنْ مُوسَى الْجُهَنِيِّ ، ح وَحَدَّثَنَا مُحَمَّدُ بْنُ عَبْدِ اللَّهِ بْنِ نُمَيْرٍ ، - وَاللَّفْظُ لَهُ - حَدَّثَنَا أَبِي ، حَدَّثَنَا مُوسَى الْجُهَنِيُّ ، عَنْ مُصْعَبِ بْنِ سَعْدٍ ، حَدَّثَنِي أَبِي قَالَ، كُنَّا عِنْدَ رَسُولِ اللَّهِ صلى الله عليه وسلم فَقَالَ " أَيَعْجِزُ أَحَدُكُمْ أَنْ يَكْسِبَ كُلَّ يَوْمٍ أَلْفَ حَسَنَةٍ " . فَسَأَلَهُ سَائِلٌ مِنْ جُلَسَائِهِ كَيْفَ يَكْسِبُ أَحَدُنَا أَلْفَ حَسَنَةٍ قَالَ " يُسَبِّحُ مِائَةَ تَسْبِيحَةٍ فَيُكْتَبُ لَهُ أَلْفُ حَسَنَةٍ أَوْ يُحَطُّ عَنْهُ أَلْفُ خَطِيئَةٍ " .
Is one amongst you powerless to get one thousand virtues every day. Amongst those who had been sitting there, one asked: How one amongst us can get one thousand virtues every day? He said: Recite:" Exalted is Allah (He is free from imperfection) one hundred times for (by reciting them) one thousand virtues are recorded (to your credit) and one thousand vices are blotted out.