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."  

قَالَ رَسُولُ اللَّهِ ﷺ إِذَا أَحْسَنَ أَحَدُكُمْ إِسْلاَمَهُ فَكُلُّ حَسَنَةٍ يَعْمَلُهَا تُكْتَبُ لَهُ بِعَشْرِ أَمْثَالِهَا إِلَى سَبْعِمِائَةِ ضِعْفٍ وَكُلُّ سَيِّئَةٍ يَعْمَلُهَا تُكْتَبُ لَهُ بِمِثْلِهَا  

from the Prophet ﷺ narrating from his Lord said, "Allah has ordered that the good and the bad deeds be written down, and He then explained how ˹they be written down˺: (1) He who intends to do a good deed but he does not do it, then Allah records it for him as a full good deed, (2) but if he carries out his intention, then Allah ﷻ writes it down for him as from ten to seven hundredfolds, and even more. (3) But if he intends to do an evil act and has not done it, then Allah writes it down with Him as a full good deed, (4) but if he intends it and has done it, Allah writes it down as one bad deed."  

عَنِ النَّبِيِّ ﷺ فِيمَا يَرْوِي عَنْ رَبِّهِ ﷻ، قَالَ قَالَ: «إِنَّ اللَّهَ كَتَبَ الْحَسَنَاتِ وَالسَّيِّئَاتِ، ثُمَّ بَيَّنَ ذَلِكَ: (١) فَمَنْ هَمَّ بِحَسَنَةٍ فَلَمْ يَعْمَلْهَا كَتَبَهَا اللَّهُ لَهُ عِنْدَهُ حَسَنَةً كَامِلَةً، (٢) فَإِنْ هُوَ هَمَّ بِهَا فَعَمِلَهَا كَتَبَهَا اللَّهُ لَهُ عِنْدَهُ عَشْرَ حَسَنَاتٍ إِلَى سَبْعِمِائَةِ ضِعْفٍ إِلَى أَضْعَافٍ كَثِيرَةٍ، (٣) وَمَنْ هَمَّ بِسَيِّئَةٍ فَلَمْ يَعْمَلْهَا كَتَبَهَا اللَّهُ لَهُ عِنْدَهُ حَسَنَةً كَامِلَةً، (٤) فَإِنْ هُوَ هَمَّ بِهَا فَعَمِلَهَا كَتَبَهَا اللَّهُ لَهُ سَيِّئَةً وَاحِدَةً۔»