What is the ruling on the prayer and ablution of one who forgot the legal ruling regarding the presence of urine stains on clothes or the exit of urine drops during prayer for a period of four years?

Purity is a condition for the validity of prayer. Thus, whoever prays while having an impurity on them, knowing about it, their prayer is invalid. If they were ignorant or forgetful, there is a difference of opinion regarding the obligation of repeating it. If urine comes out during prayer, the prayer is invalid because ablution is nullified. One who suffers from urinary incontinence is an exception; they should take precautions, perform ablution for each prayer, and then pray, and their prayer is valid. However, if the leakage is intermittent, then purification and re-performing ablution are required if it comes out before the prayer. But if it comes out during the prayer, the prayer is invalidated. The prayers performed in that state are a debt that must be made up as much as possible. If you do not know the number of prayers, then make up what you most likely believe is sufficient. Whoever prayed with impurity out of forgetfulness or ignorance, their prayer is valid. However, whoever prayed while in a state of ritual impurity (hadath) out of forgetfulness or ignorance must repeat it. Some scholars are of the opinion that whoever neglected a condition or a pillar out of ignorance of its obligation is not required to make up what has passed.