How to Stop Whispers During Prayer
Question

I am suffering from strong Waswas in all my acts of worship, especially istinja (cleansing after relieving myself). When I use the toilet, I just spend too long a time. It became a very hateful place to me for whatever reason. Every time I enter the toilet I cry because of how strong this Waswas is. I do not feel sure of my Tuhr (purification) at all. Many things put doubt in my heart, like when my hand touches a tahir (clean) place after I washed a najis (unclean) place, so I have to wash that position as well. Also when the water of istinja sprinkles on my feet and body I doubt my Tuhr so I have to wash them after finishing.
What is the solution? Many have said to me to just ignore this Waswas. But I don’t really know how to make sure I am on Tuhr.
If the urine touches any other place do I have to wash it or not? If I ignore washing it I doubt and wonder that if I am not pure then my salah (prayer) will not be accepted. On the other hand if I wash I feel it is really heavy and beyond my ability.
Another question:
What is the ruling on prematurely ending my salah or wudu (ablution) or ghusl (bath) as this comes to my mind a lot?
Sometimes I think that it is not a problem to cut my intention during the act of worship and I just complete it. Other times I think that deciding to cut an act of worship spoils it as I cut my intention as well so I stop it then start over. This matter also became out of my control, what should I do? Shall I continue my salah, wudu or ghusl even if I decide during it to cut it? Or should I start it over then?
These doubts do not leave me since I start my salah until the end of it. Something whispers to me to stop it or repeat it or start it over again after you complete it. I am tired and this is beyond my ability. Will my salah be acceptable despite having all these doubts along the salah? What is the solution? Please help me, may Allah bless you!
Praise be to Allah.Understanding the Source of Whispers in Prayer
What the questioner mentions has to do with a kind of WaswasWaswas (whispers from the devil), because purification and prayer are simple matters that do not need such concern. The religion of Allah is easy and there is no hardship in it, as Allah says (interpretation of the meaning):
{and has not placed upon you in the religion any difficulty.} [Al-Hajj 22:78]
{Allah intends for you ease and does not intend for you hardship.} [Al-Baqarah 2:185]
And the Prophet (peace and blessings of Allah be upon him) said: “The religion is very easy and whoever overburdens himself in his religion will not be able to continue in that way. So you should not be extremists, but try to be near to perfection and receive the glad tidings that you will be rewarded.” (Narrated by Al-Bukhari, 39)
Overcoming Shaytan’s Whispers during prayer
The remedy for whispers in prayer involves three things:

Constantly persisting in remembering Allah, may He be Exalted.
Turning to Him and asking Him for healing and recovery from this problem.
Turning away completely from what the Waswas is calling you to do. So when you have relieved yourself and washed yourself (Istinja’), get up and do not pay any attention to whether your hand touched a pure place after touching the impurity, or that drops of the Istinja’ water landed on your feet or body, because the basic principle is that things remain pure, and uncertainty as to whether your body or clothes have become impure does not have any effect.

You should understand that your body and clothes, the place where you pray, and other things are pure and continue to be regarded as pure unless we are certain that they have become impure. As for doubts, imagination and Waswas, no attention should be paid to them.
Purification and removal of impurity is done by washing the private part; it is not essential to wash the area around it, so do not pay any attention to the water that drops elsewhere, as stated above.
Be confident that you are pure, praise be to Allah, and that your prayer offered with this purification is valid and accepted, if Allah wills, for Allah is Most Merciful and Kind, and He shows mercy to His sinful slaves, so how about those who are obedient and love Him?
With regard to deciding to stop Wudu or prayer, that does not matter either, rather you should ignore these thoughts and carry on with your Wudu or prayer, because there is no reason to interrupt an act of worship, rather this is Waswas and it does not affect your act of worship, praise be to Allah. No matter what thoughts of interrupting your act of worship or repeating it come to you, do not pay any attention to that, and carry on with it, and ask Allah to accept it, because you have done as much as you could, and you have done what was required of you, and Allah does not burden any person beyond his scope.
Remember this advice, and carry on, and ignore the Waswas, for it is a trick of the devil, but his tricks are weak as our Lord has told us. Be confident that if you ignore the Waswas it will disappear, by the power of Allah.
We ask Allah to help you to obey Him and to make you happy by worshipping Him, and to take away the problem that you are facing.
And Allah knows best.