Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī

ذِكْرُ الْإِخْبَارِ عَمَّا تَفَضَّلَ اللَّهُ عَلَى الْمُحْسِنِ فِي إِسْلَامِهِ بِتَضْعِيفِ الْحَسَنَاتِ لَهُ

ibnhibban:228 – al-Ḥasan b. Sufyān > al-ʿAbbās b. ʿAbd al-ʿAẓīm > ʿAbd al-Razzāq > Maʿmar > Hammām b. Munabbih > Abū Hurayrah

[Machine] The Messenger of Allah ﷺ said, "When one of you improves his Islam, then every good deed he does will be multiplied by ten times its value up to 700 times, and every bad deed he does will be recorded as its equal until he meets Allah, the Exalted and Glorious."  

ابن حبّان:٢٢٨ – أَخْبَرَنَا الْحَسَنُ بْنُ سُفْيَانَ قَالَ حَدَّثَنَا الْعَبَّاسُ بْنُ عَبْدِ الْعَظِيمِ قَالَ حَدَّثَنَا عَبْدُ الرَّزَّاقِ قَالَ أَخْبَرَنَا مَعْمَرٌ عَنْ هَمَّامِ بْنِ مُنَبِّهٍ عَنْ أَبِي هُرَيْرَةَ قَالَ

قَالَ رَسُولُ اللَّهِ ﷺ «إِذَا أَحْسَنَ أَحَدُكُمْ إِسْلَامَهُ فَكُلُّ حَسَنَةٍ يَعْمَلُهَا بِعَشْرِ أَمْثَالِهَا إِلَى سَبْعِ مِائَةِ ضِعْفٍ وَكُلُّ سَيِّئَةٍ يَعْمَلُهَا يُكْتَبُ لَهُ مِثْلُهَا حَتَّى يَلْقَى اللَّهَ جَلَّ وَعَلَا»  

See similar narrations below:

Collected by Aḥmad, Suyūṭī
ahmad:8217 –

[Machine] And the Messenger of Allah ﷺ said, "Whenever one of you improves his Islam, every good deed he does will be recorded as ten good deeds up to seven hundred times, and every bad deed he does will be recorded as its equivalent until he meets Allah."  

أحمد:٨٢١٧ –

وَقَالَ رَسُولُ اللهِ ﷺ إِذَا أَحْسَنَ أَحَدُكُمْ إِسْلَامَهُ فَكُلُّ حَسَنَةٍ يَعْمَلُهَا تُكْتَبُ بِعَشْرِ أَمْثَالِهَا إِلَى سَبْعِ مِائَةِ ضِعْفٍ وَكُلُّ سَيِّئَةٍ يَعْمَلُهَا تُكْتَبُ لَهُ بِمِثْلِهَا حَتَّى يَلْقَى اللهَ ﷻ  

suyuti:1035a –

Messenger of Allah ﷺ said, "If any one of you improve (follows strictly) his Islamic religion then his good deeds will be rewarded ten times to seven hundred times for each good deed and a bad deed will be recorded as it is." (Using translation from Bukhārī 42)   

السيوطي:١٠٣٥a –

"إذا أحسَن أحدُكم إسلامَه فكلُّ حسنةٍ يعملها تكتب له بعشرِ أمثالها إلى سبعمائة ضعفٍ، وكلُّ سيئةٍ يعملها تكتبُ له بمثلها حتى يلقى الله".  

[حم] أحمد [خ] البخاري [م] مسلم عن أبى هريرة
suyuti:1244a –
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السيوطي:١٢٤٤a –

"إِذَا أسلمَ العبدُ كَتبَ اللهُ له كلَّ حسنَةٍ قدَّمْها ومحَا عنه كلّ سيئة زَلَفها ثم قيلَ له: إِئتنفْ العمل، الحسنةُ بعْشرِ أمْثَالِها إلى سَبْعمائة ضعف، والسيئةُ بمثلها، إلا أن يعفو الله وهو الغفور".  

سمويه عن أبي سعيد