What is the ruling on recurring doubts and whispers concerning the pronunciation of the Takbir, Taslim, recitation of Al-Fatiha, and the Tashahhud in prayer, especially when performed silently, and what are the implications for the validity of the prayer if one disregards these doubts?

The cure for obsessive thoughts is to turn away from them, ignore them, and not pay attention to them. Whoever is reciting should not pronounce a letter more than once, nor should they repeat a recitation no matter how much Satan whispers that it is incorrect, and they should not repeat any of the prayers after finishing them. Doing so is what pleases Allah; it is not abandoning prayer or wasting it, but rather it is fulfilling an obligation and submitting to Allah's law. In it lies great comfort and good in this life and the Hereafter.