What comes to you of good is from Allah , but what comes to you of evil, [O man], is from yourself. And We have sent you, [O Muhammad], to the people as a messenger, and sufficient is Allah as Witness.
Surah An-Nisā’ (4:79)
Narrated Abu Huraira: Allah’s Apostle said, “When anyone of you stands for the prayers, Satan comes and puts him in doubts till he forgets how many Rakat he has prayed. So if this happens to anyone of you, he should perform two prostrations of Sahu while sitting {Sahih Bukhari, Volume 2, Book 22, Number 324}
“We created not the heavens, the earth, and all between them, but for just ends. And the Hour is surely coming (when this will be manifest). So overlook (any human faults) with gracious forgiveness. For verily it is thy Lord who is the Master-Creator, knowing all things. And We have bestowed upon thee the Seven oft-repeated verses (Surah al-Fatiha) and the Grand Qur’an. Strain not thine eyes (wistfully) at what We have bestowed on certain classes of them, nor grieve over them: but lower thy wing (in gentleness) to the Believers.”- Al Hijr, 85-88