Question:
What is the ruling if a small child’s urine falls on a garment?
Answer:
On this issue, the correct position is that the urine of an infant whose only food is (the mother’s) milk is a light and minor impurity, and to purify it, it is sufficient merely to sprinkle water on it. The method is to pour water over the garment until it soaks into it without rubbing or wringing it.
The evidence for this is that it is established from the Prophet ﷺ that a small child was brought to him, and he seated the child on his lap, and the child urinated. He ﷺ called for water and poured it over the place of urine and did not wash it.
As for a girl’s urine, it is necessary and obligatory to wash it, because the basic principle in this matter is that urine is impure and washing it is obligatory; however, since the Sunnah provides evidence, the suckling infant boy is excepted from this.