What is the ruling on a drop or more of urine or prostatic fluid (wady) coming out after urinating, given that the location of its contamination on the garment is unknown, and is it obligatory to wipe the garment with water or to wash it?

The impure spot on the garment must be washed. If the spot is not pinpointed, the entire garment should be washed. This applies if one is certain of contamination by impurity. However, doubt and obsessive thoughts should be disregarded. Scholars have differed regarding a small amount of impurity. Some consider it excused if it is minor, like a drop of urine or prostatic fluid (wady), or an amount equivalent to the size of a dirham, or that which is difficult to guard against. Others believe that a small amount of impurity is not excused, especially urine and feces. This latter opinion is more cautious, and therefore, the impure spot or the entire garment should be washed if it is contaminated by a drop of urine or prostatic fluid.