What is the ruling on water falling from the washer onto clothes and the body when washing a remaining drop of urine on the penis, and scattered drops of urine on the thighs, by filling the palm or half of it with pure water?

The water falling from a urination washer is considered pure if it has not changed. This is the established view among jurists: that the water used to wash something impure, if it separates without undergoing any change, is considered pure.