The ruling on one who is affected by urine whose location he does not know

Question:
If a person has urine on him and he does not know where it is?

Answer:
He should investigate and wash what was affected by it. He should investigate its location on his body or on his garment and wash it. If it remains hidden from him, he should wash the entire garment, and praise be to Allah.
Q: Is sprinkling sufficient?
A: No, sprinkling is not sufficient for urine. Sprinkling is sufficient for pre-seminal fluid and the urine of a small boy who has not yet started eating food.