The Whisperings of the Shaytan

Question :

How can a Muslim rid himself of Shaytan's whispers - whispers that have a detrimental effect on one's religion?

Answer:

This whispering sometimes happens related to one's purity, and sometimes regarding the prayer. It is merely something that Shaytan does to cause confusion in one's mind.

So he should seek refuge from the Shaytan stick with what is normal, which is that he is in a pure state, and avoid whatever Shaytan suggests, like, that he did not utter this phrase, or he

has not performed ablution etc. Sometimes, Shaytan whispers to his victim about more serious matters: his faith, the knowledge of the unseen, Allah's attributes, the Hereafter. The cure: one should ward off any doubts in those matters by thinking about what strengthens one's faith. One should contemplate the signs and the proofs, and think about creation. In terms of the unseen, one should put his faith completely in what is told thereof in the Qur'an and the Sunnah. While believing in the matters of the unseen, though, he should not try to contemplate the reality of Allah's attributes or of the nature of Lordship or other similar matters. He should apply this advice until his faith becomes firm. And may Allah guide us all.

Source:
Ibn Jibreen
Fatawa Islamiyah, Vol. 8 Page 311