Narrated By Abu Huraira:

Allah's Apostle 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 al-Bukhari, Volume 001, Book 002, Hadith Number 040.

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"Nay! man is evidence against himself. Though he puts forth his excuses." Holy Qur'an (75:14-15)