Is it permissible to adopt Al-Shawkani's view regarding the Sunnah of removing impurity from the body, clothing, and place of prayer, and are there any reliable scholars who agreed with him? And is it permissible to adopt the view of the Zahiris that water never becomes impure, whether flowing or stagnant, little or much, and whether its color, taste, or smell has changed or not?

The treatment for intrusive thoughts (waswas) is to ignore them and not pay attention to them. It is also advisable to consult a trustworthy psychiatrist. What was attributed to Al-Shawkani, namely the statement that removing impurity is a Sunnah, is incorrect. He chose the obligation of avoiding it. However, the opinion that it is a Sunnah exists among the Malikis, and it can be adopted by someone who suffers from waswas.

Regarding water becoming impure: Consensus has been reported that water becomes impure if its properties change due to impurity. The Zahiris and Malikis differed concerning a small amount of water. Their opinion that water does not become impure unless its properties change due to impurity can be adopted. When in doubt about whether water has changed or whether what changed it is pure, the default assumption is that it has not changed and is pure.