Surah Al-Muzzammil 73, #20

Al Quran : And whatever good you send forward for yourselves , you will certainly find it with Allah, better and greater in reward. And seek Forgiveness of Allah. Verily, Allah is Oft-Forgiving, Most-Merciful . 
{Surah Al-Muzzammil 73, #20} 

Narrated Abu Huraira Radi Allaho Anho: Allah's Apostle Sallallahu Alaihi Wasallam 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." 
{Sahih Bukhari, Vol 1, Book 2, No. 41}

It is narrated on the authority of Abu Huraira that the Messenger of Allah sallallahu alaihi wasallam said Allah, the Great and Glorious, said: Whenever my bondsman intends to do good, but does not do it, I write one good act for him, but if he puts it into practice I wrote from ten to seven hundred good deeds in favour of him. 
When he intends to commit an evil, but does not actually do it, do not record it. But if he does it, I write only one evil.
{Sahih Muslim, Book 1, Hadith 234}