Abu Huraira reported: The Messenger of Allah, peace and blessings be upon him, said, “Allah the Exalted said: If my servant intends to do a good deed and he does not do it, then it is recorded for him as a good deed. If he does it, then it is recorded as ten good deeds and multiplied up to seven hundred times. If my servant intends to do an evil deed and he does not do it, then it is not recorded for him. If he does it, then it is recorded as a single bad deed.”
Source: Sahih Bukhari 7062, Sahih Muslim 128
Grade: Muttafaqun Alayhi (authenticity agreed upon) according to Al-Bukhari and Muslim
عَنْ أَبِي هُرَيْرَةَ عَنْ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ قَالَ اللَّهُ عَزَّ وَجَلَّ إِذَا هَمَّ عَبْدِي بِحَسَنَةٍ وَلَمْ يَعْمَلْهَا كَتَبْتُهَا لَهُ حَسَنَةً فَإِنْ عَمِلَهَا كَتَبْتُهَا عَشْرَ حَسَنَاتٍ إِلَى سَبْعِ مِائَةِ ضِعْفٍ وَإِذَا هَمَّ بِسَيِّئَةٍ وَلَمْ يَعْمَلْهَا لَمْ أَكْتُبْهَا عَلَيْهِ فَإِنْ عَمِلَهَا كَتَبْتُهَا سَيِّئَةً وَاحِدَةً
7062 صحيح البخاري كتاب التوحيد باب قول الله تعالى يريدون أن يبدلوا كلام الله
128 صحيح مسلم كتاب الإيمان باب إذا هم العبد بحسنة كتبت وإذا هم بسيئة لم تكتب
Source: Daily Hadith