How can a Muslim get rid of Waswas?

He should seek refuge in Allāh from the shayṭān, stop thinking about it, continue upon what he already did, and not pay attention to the wasāwis. For indeed, when he listens to it, the enemy of Allāh (Shayṭān) will desire/tempt him more. However, it is obligatory upon him to stop it and continue upon what he's certain of in his Wuḍūʾ, his Ṣalāh, etc. This is what is prescribed. And if the wasāwis become too many, he should disregard them and continue upon his assumption. However, if the wasāwis are few, then he should continue upon certainity in his purification, Ṭawāf, and Ṣalāh, he continues upon certainity. If he doubts whether he washed his hand, then he should wash it. If he doubts whether he washed his foot, then he washes it right away. As for after completing purification, if a new doubt comes, he shouldn’t pay attention to it. Likewise, if he finished doing Ṭawāf and a doubt arises, he shouldn’t pay attention to it. And likewise after Ṣalāh, if a doubt arises after finishing the Ṣalāh, he shouldn’t pay any attention to it. As for the doubt during the Ṣalāh itself or during the Ṭawāf or Wuḍūʾ itself, then he should continue upon what he's certain of. Except if they increase, then they are wasāwis that must be ignored. Then, he builds upon what he has assumed (to have completed so far), continues, this is sufficient, and he disregards these doubts that have increased upon him. However, if the waswasah is less, then he continues upon certainity in his Ṭawāf, Ṣalāh and Wuḍūʾ.