IBNHIBBAN 825:
from Muṣʿab b. Saʿd from his father —
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:" Hallowed be Allah" one hundred times for (by reciting them) one thousand virtues are recorded (to your credit) and one tbousand vices are blotted out. (Using translation from Muslim 2698)
ابن حبّان ٨٢٥:
عن مصعب بن سعد عن أبيه —
كُنَّا جُلُوسًا عِنْدَ رَسُولِ اللَّهِ ﷺ فَقَالَ «أَيَعْجَزُ أَحَدُكُمْ أَنْ يَكْتَسِبَ كُلَّ يَوْمٍ أَلْفَ حَسَنَةٍ»؟ فَسَأَلَهُ نَاسٌ مِنْ جُلَسَائِهِ وَكَيْفَ يَكْتَسِبُ أَحَدُنَا يَا رَسُولَ اللَّهِ كُلَّ يَوْمٍ أَلْفَ حَسَنَةٍ؟ قَالَ «يُسَبِّحُ اللَّهَ مِائَةَ تَسْبِيحَةٍ فَيَكْتُبُ اللَّهُ لَهُ أَلْفَ حَسَنَةٍ وَيَحُطُّ عَنْهُ أَلْفَ سَيِّئَةٍ»
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