Is it obligatory to repeat ablution if one feels a drop of urine coming out after urination, and what is the ruling on the prayer of one who doubts his state of purity?

The questioner is suffering from obsessive doubts after urinating, so he must abandon them, as they are from Satan. He must also frequently supplicate, seek help, and rely on Allah, as stated in His verse: "Indeed, he has no authority over those who believe and rely upon their Lord." After performing istinja' (washing after urinating or defecating) and ensuring the cessation of urine, it is recommended to sprinkle his private parts and trousers with water to cut off the obsessive doubts. He may pray with that ablution as long as he is not certain of the descent of urine drops.